the loins: the lower back and hips where a belt is fastened, and, in the same breath, the part of a man's body his children are said to come from.
TranslatabilityPartialCertaintySettled
In ordinary Greek this is a plain anatomical word for the lower back and hips, the narrow band of the body a belt sits on. Two of the eight New Testament uses are exactly that, describing the leather belt John the Baptist wore.
From that plain body part the word does two further jobs, both of them ordinary in Greek and in the Hebrew scriptures behind it:
it stands for readiness, because someone in a long robe had to gather it up and belt it before running or working hard
it stands for a man's line of descent, because his children were pictured as coming out of his own body
The readiness picture is why Jesus tells his followers to keep their waists belted and their lamps burning, why Paul has the Christian tie truth around the waist before putting on anything else, and why Peter tells his readers to gather up the loose ends of their thinking. None of it is about muscle or about sex. It is about clothing you can actually move in.
The descent picture is what Hebrews leans on when it says Levi was still in his ancestor's body when Abraham met Melchizedek. Greek had other ways to speak about family lines, such as the word for the inner body and the womb (κοιλία) or the word for seed and so for offspring (σπέρμα). This is the one that points at the father's own body as the place a family line starts.
Nuances
1athe waist: the part of the body a belt or sash is fastened around.
TranslatabilityDirect
Mat 3:4Mrk 1:6
1bthe waist as the place a long robe is gathered up and belted so a person can move: a stock picture of being ready for action.
Luk 12:35Eph 6:14*1Pe 1:13
1cthe loins as the place a person's children come from: the ancestor's own body, named as the source of a family line.
The Greek is a neutral, everyday name for the lower back and hips, plain enough to use in a passing note about what a man wore.Mat 3:4Mrk 1:6
Both
Both words point to the region of the body between the ribs and the hips.Mrk 1:6Luk 12:35
Only loins
In modern English "loins" is either an archaism or a coy word for the sexual organs, and it doubles as a cut of meat, so it lands with an awkwardness the Greek word never had.
The Greek word also serves as the name for where a family line begins, a job "waist" cannot do at all.Act 2:30Heb 7:10
Both
Both name the narrow part of the body that a belt is fastened around.Mat 3:4Eph 6:14
Only waist
English "waist" belongs mostly to clothing sizes and body shape, so it sounds like a measurement rather than a working part of the body you tie things onto.
The Greek keeps the bodily picture, so a promise about a family line is described as carried in the ancestor's own body.Act 2:30Heb 7:10
Both
Both point to children and grandchildren who are not yet born.Act 2:30Heb 7:5
Only descendants
English "descendants" names people rather than a part of the body, which is clear but drops the image the sentence was built on.
“body”
Comparison data is not available for this English gloss yet.
How osphus differs from similar Greek words
κοιλίαthe inner body: the belly, the stomach, and the mother's womb. It names where a child is carried and fed, where the loins name the father's side of a family line.
Names the waist as the part of the body a belt goes around, so it appears whenever someone's clothing is described or tied up for work, travel, or battle.Mat 3:4Mrk 1:6Luk 12:35Eph 6:14
Belongs to a stock picture of readiness: gathering up a long robe at the waist so you can move fast, which is then applied to a mind braced for action.Luk 12:351Pe 1:13
Traces descent through the father, naming the man a family line comes out of, even for a descendant not yet born.Act 2:30Heb 7:5Heb 7:10
Both
Both can speak of where a family line comes from, but from opposite sides: one is the mother who carries the child, the other is the father the line runs through.Luk 1:42Heb 7:5
Both name a broad region of the middle of the body rather than one exact organ, which is why English Bibles pick a different word for each scene, from "stomach" or "womb" for the one to "waist" or "loins" for the other.Mat 15:17Mat 3:4
Names the womb, the place a child is carried before birth, so it is the word that turns up in birth and pregnancy scenes.Luk 1:41Luk 1:42Jhn 3:4Gal 1:15
Names the stomach as the place food actually goes, which is why it shows up in arguments about eating, hunger, and what does or does not defile a person.Mat 15:17Mrk 7:19Luk 15:161Co 6:13
Stands for a person's appetite and inner drive, so it can be spoken of as the thing someone really serves or worships.Rom 16:18Php 3:19
Points to a hidden inner space that something can be inside of, whether a man swallowed by a sea creature or a scroll that turns bitter once it is eaten.Mat 12:40Rev 10:9Rev 10:10
σπέρμαseed, and from there offspring. It names the descendants themselves, where the loins name the ancestor's body they are said to come out of.
It names a real part of the body, the band of the lower back and hips that a belt is fastened around, which is simply what John the Baptist wore his leather belt on.Mat 3:4Mrk 1:6
Because a long robe had to be gathered up and belted before anyone could run or work, this word becomes the stock picture of being dressed and ready for action, with nothing to do with family at all.Luk 12:35Eph 6:141Pe 1:13
Even where it does speak of a family line, it points at the ancestor rather than at the children: it names the man's own body as the place the line starts, which is how Hebrews can say Levi was still inside his forefather when Melchizedek met him.Heb 7:5Heb 7:10
Both
Both words say that someone belongs to a particular family line, so an English Bible can render either one as "descendants": Peter says God swore to David that a king would come from his own body, and Paul says God brought Israel a Savior out of David's offspring.Act 2:30Act 13:23
Both do heavy work in arguments about who counts as belonging to Abraham, one saying the priestly tribe came out of his body, the other saying it is his offspring that God came to help.Heb 7:5Heb 2:16
It is the ordinary farming word for a seed dropped into the ground that grows into a plant, from a grain sown in a field to the tiny mustard seed.Mat 13:24Mrk 4:311Co 15:38
When it speaks of family it names the descendants themselves, the actual people who came from an ancestor, and it can stretch to a whole nation claiming one forefather centuries later.Jhn 8:33Rom 9:7Gal 3:29
It can narrow from a crowd of descendants down to one promised heir, which is how the New Testament writers use it to identify Jesus as the descendant of David and of Abraham.Rom 1:3Gal 3:162Ti 2:8
It also covers the power to have children in the first place, and once it pictures the new life God plants inside a person who belongs to him, uses that have no connection to a belt or a body part.Heb 11:111Jn 3:9
μηρόςthe thigh, the upper leg, named in the New Testament as the place a sword hangs and a title is written. It is the neighboring body part, but it never carries the belting or the descent picture.
Names the waist and the small of the back, the place a belt is fastened, which is why it turns up when a writer is describing what someone has on. John the Baptist wears a leather belt around this part of him.Mat 3:4Mrk 1:6
Because a long robe had to be gathered and tied at the waist before anyone could run, fight, or work, the word became a picture of being ready to move. Older English Bibles keep the phrase "gird up your loins" for it.Luk 12:35Eph 6:141Pe 1:13
Stands for the part of a man that his children come from, so a descendant can be spoken of as having been inside an ancestor generations before being born.Act 2:30Heb 7:5Heb 7:10
Both
Both belong to the same stretch of the body, from the waist down across the top of the leg, and each is mentioned alongside what a person is wearing rather than as a study of the body: a name written at the thigh, a belt tied at the waist.Rev 19:16Mat 3:4
Names the upper leg itself, the thick part of the body between hip and knee, so it points to a limb that stands out on a person walking or riding.Rev 19:16
In its one New Testament appearance the thigh serves as a surface for display: the rider on the white horse carries his title written on his robe and on his thigh, set where anyone he passes can read it.Rev 19:16
osphus in the other biblical languages
מׇתְנַיִםHebrew“loin”the everyday Hebrew word for the loins or waist, and the usual word standing behind this Greek one: the belted waist of the Passover meal and of a prophet sent out in a hurry.
Names the loins as the source of physical descent, the place a person's offspring are said to come from.Act 2:30Heb 7:5Heb 7:10
Marks the waist as where the rough clothing of a wilderness prophet is fastened.Mat 3:4Mrk 1:6
Both
Both name the loins as the place a person tightens a garment to be ready for hard action or travel, the literal core of the idiom we read as bracing oneself.Exo 12:11Luk 12:35
Both serve in the figure of girding the waist with a quality such as truth or readiness, the body picture standing for being equipped and resolved.Isa 11:51Pe 1:13
Pictures the loins shaking or buckling as the body's seat of strength giving way under fear or grief.Isa 21:3Ezk 21:6Nam 2:10Psa 69:23
Is the spot where sackcloth is bound on the body as a sign of mourning.Gen 37:34Amo 8:10
חָלָץHebrew“loin”the Hebrew word in the promise that kings would come out of a man's loins, so it carries the same picture of a family line starting in the father's own body.
It takes the picture of a belted, braced waist all the way inside, so that the part of the body made ready for hard work becomes the mind made ready for hard thinking.1Pe 1:13
When it names the body as the origin of children, it reasons backward from an ancestor already long dead, proving that a later person belongs to his line.Act 2:30Heb 7:5Heb 7:10
It turns up in plain narrative report of what a particular man actually wore around his middle, simply describing his clothing rather than picturing readiness or lineage.Mat 3:4Mrk 1:6
Both
Both name the middle of the body as the place a belt is tied, and both use tying that belt as the standard picture of getting ready to move or work, an idiom that passes straight from the Hebrew scriptures into the Greek of the New Testament with the Greek word standing in for the Hebrew one.Job 38:3Isa 5:27Luk 12:35
Both can stand for the body as the source of a man's descendants, so that children said to come out of a man's middle are simply the people descended from him.Gen 35:11Heb 7:5
Both let a quality take the place of the leather belt, so that what holds a person together for action is named as a virtue worn around the body.Isa 11:5Eph 6:14
Both are usually rendered "loins" or "waist" in English, a plain word for the lower trunk that both languages treat as the body's working center.Job 40:7Mat 3:4
It locates in this part of the body the doubling-over pain of sheer terror, as grown men clutch their middle the way a woman does in labor.Jer 30:6
It can mean the bare flesh that a poor man's missing clothing would have warmed, so the word carries ordinary bodily need and not only imagery.Job 31:20
Tying cloth around this part of the body can signal grief rather than readiness, when what is tied there is the rough sacking of mourning.Isa 32:11
When it names the body as the origin of children, it looks forward from a living man to offspring not yet born, as a promise made to him about his future.Gen 35:111Ki 8:192Ch 6:9
יָרֵךְHebrew“thigh”the thigh, the upper leg. It shares the descent picture of children coming out of a man's body, but it also names the hip that can be wrenched out of joint and the side or base of a built object such as the tabernacle.
Girding the loins becomes a figure for being ready and self-controlled: dressed for action, alert, and clear in mind rather than dozing.Luk 12:35Eph 6:141Pe 1:13
Both
Both name the lower body as the source of a person's descendants, so a man's offspring are said to come out of his loins.Act 2:30Heb 7:10Gen 46:26
Both mark the place at the waist and thigh where a belt is fastened or a sword is hung, the spot you gird before setting out.Mat 3:4Psa 45:3Exo 32:27
Names the literal upper leg as a distinct joint, the hip that can be struck a heavy blow or wrenched out of its socket.Gen 32:25Gen 32:31Jdg 15:8
Extends beyond the body to the side or base of a made object: the flank of the tabernacle, the side of the altar, the shaft of the lampstand.Exo 25:31Exo 40:22Lev 1:11
Anchors set gestures: a hand laid under the thigh to seal a solemn oath, and a hand struck against the thigh in grief and shame.Gen 24:2Gen 24:9Jer 31:19
כֶּסֶלHebrew“loin”the flank beside the kidneys, the same stretch of the body, but in Hebrew it usually turns inward and names the confidence a person leans on, which can sour into smugness.
Only the Greek word carries the language of physical descent, so that children and later generations are spoken of as coming out of a man's body at this place.Act 2:30Heb 7:5Heb 7:10
It is the part of the body a person belts up before hard work, a journey, or a fight, so it becomes a standing picture of readiness, and the New Testament turns that picture on the mind as well as the body.Luk 12:35Eph 6:141Pe 1:13
Both
Both name the same stretch of the body, the flanks and lower back beside the kidneys, the place a belt sits, which is why older English Bibles render each of them "loins".Psa 38:7Lev 3:4Mat 3:4Mrk 1:6
Neither word stays merely anatomical: each is used for what that part of the body stands for, the Hebrew for the confidence a person rests on and the Greek for the descendants who come from a man.Pro 3:26Act 2:30
The Hebrew word moves inward and names an attitude rather than a body part: the confidence a person leans on, whether that trust rests rightly on God or wrongly on wealth.Pro 3:26Psa 78:7Job 31:24Job 8:14
That same inward use can sour into a negative one, naming the smug self-assurance of people who are certain of themselves and wrong, which is why it is sometimes rendered "folly" or "stupidity".Psa 49:13Ecc 7:25
In the sacrificial instructions it is an exact butcher's term for the fat lying against the flanks, which had to be cut away with the kidneys and burned.Lev 3:4Lev 3:10Lev 4:9Lev 7:4
It can also picture sheer bodily bulk, fat gathered over the flanks as the image of a man grown heavy and complacent in his prosperity.Job 15:27
What scholars say about osphus
The critical lexica treat ὀσφῦς as a single lexeme with two closely related applications. BDAG gives (1) the waist or loins as an anatomical region, the part of the body a girdle encircles, and (2) the loins as the seat of generative power, hence a periphrasis for paternal descent; LSJ documents the anatomical sense broadly in classical medical and general usage, including the sacrificial portion. Louw and Nida likewise place the word in the body-parts domain with a distinct sub-entry for the procreative reference. The procreative application is not a native Greek development but reflects Septuagint idiom: ὀσφῦς regularly renders מָתְנַיִם and חֲלָצַיִם, including the descent formula of Genesis 35:11 and 1 Kings 8:19 ("who shall come out of your loins"), and this is the usage Acts 2:30 and Hebrews 7:5, 10 presuppose. Attridge notes that the Hebrews argument depends on this seminal-presence idiom rather than on any theory of corporate personality peculiar to the author. The girding expressions (Luke 12:35;Ephesians 6:14;1 Peter 1:13) are similarly Septuagintal, echoing Exodus 12:11 and the commissioning language of 1 Kings 18:46 and Jeremiah 1:17; Achtemeier reads the participle in 1 Peter 1:13 as governing the whole exhortation, so that the metaphor of a belted robe frames the readers' mental preparedness.