StrongerBible

ptaiō

πταίω

GreekG4417“stumble, sin, ...”

Appears 5 times · tap a cell to see the verses

Rom 11:11Jas 2:10Jas 3:2 (2×)2Pe 1:10
Root family
Names & words formed with this
Word studyResearch-gradePTAH-ee-ohverb

What ptaiō means

to stumble: to strike the foot against something and lose one's footing, used for failing morally (sinning) and, at its strongest, for coming to ruin.

TranslatabilityPartialCertaintyStrong

The picture behind this verb is a foot catching on an obstacle in the road. It is not the word for falling flat (that is a different Greek verb πίπτω); it is the word for the trip itself, the moment of losing your footing. From that vivid image the New Testament writers draw a range of weight, and the same word can be light or grave depending on the sentence around it.

Most often it pictures moral failure. To stumble is to sin, but the word keeps the sense of frailty: a creature who cannot walk perfectly straight, tripping again and again, especially in speech. James uses it exactly this way, both for a single wrong step that makes a person guilty and for the many ways all of us slip every day.

At its heaviest the same verb means to come to ruin, to be finally lost. That is how the strongest readers hear it in Peter's promise that those who live out the Christian virtues will never stumble, meaning never fall away and forfeit the kingdom. Between these poles sits Paul's careful use for Israel: they stumbled, but they did not fall past all recovery. Because the one word stretches from a small slip to total loss, no single English word carries it everywhere; the reader has to listen for which weight the context calls for.

Nuances

1ato sin, to fail morally: the everyday tripping of frail people, and even a single wrong step that breaks faith with God.
CertaintySettled
Jas 2:10Jas 3:2 (2×)
1bto stumble without falling for good: a real and blameworthy trip that still leaves room to recover.
Rom 11:11
1cto come to ruin, to be finally lost: to suffer lasting disaster rather than a passing slip.
CertaintyContested
2Pe 1:10
2Pe 1:10

Whether the verb in 2 Peter 1:10 means a final falling away that forfeits salvation, or an ordinary moral lapse.

  • majorityIt means eschatological ruin: those who practice the Christian virtues will never fall away and lose the eternal kingdom.; Richard J. Bauckham, Jude, 2 Peter, WBC 50 (1983), 189-190; Peter H. Davids, The Letters of 2 Peter and Jude, PNTC (2006), 191-193; Thomas R. Schreiner, 1, 2 Peter, Jude, NAC 37 (2003), 304-306
  • minorityIt means an occasional moral lapse, like the daily stumbling of James 3:2, not the loss of salvation.; Charles Bigg, A Critical and Exegetical Commentary on the Epistles of St. Peter and St. Jude, ICC (1901); J. B. Mayor, The Epistle of St. Jude and the Second Epistle of St. Peter (1907)

What scholars say about ptaiō

The major working lexicons preserve a real polysemy rather than a single gloss. BDAG (Danker, 3rd ed., 894) gives two intransitive senses: (1) "stumble, trip," extended to "make a mistake, go astray, sin" (James 2:10; 3:2), and (2) "experience disaster, be ruined, be lost" (Romans 11:11; 2 Peter 1:10). Louw-Nida split the data across two domains, placing the moral use and Romans 11:11 under "sin, do wrong" (88.298) but 2 Peter 1:10 under "experience disaster" (21.8); Spicq (TLNT 3:196-200) and NIDNTTE stress the same ambiguity at each locus. Etymologically the verb belongs with verbs of striking (Beekes, EDG, 1245-46; Frisk II.610) and is not a byform of the verb for falling, correcting older lexica. In the Septuagint it chiefly renders the Hebrew nagap (niphal), "be defeated in battle," within a Deuteronomistic frame of covenant judgment (Muraoka; Hatch-Redpath), which colors the New Testament overtones of ruin. On Romans 11:11 a graded-contrast reading (Dunn, Romans 9-16, WBC 38B, 652-54; Barrett; Kruse) treats the verb as deliberately lighter than the paired verb for falling, while others (Moo, Romans, NICNT, 686-88; Jewett; Fitzmyer) locate the escalation in context rather than the verb, with converging theological result. On James 2:10 and 3:2 the commentators (Dibelius; Davids; Johnson; Moo; Allison, ICC, 407-14 and 522-30) agree the verb means moral failing within a Hellenistic-Jewish wisdom frame, with the unity-of-the-law principle paralleled at 4 Maccabees 5:19-21. On 2 Peter 1:10 the reading of the verb as final, eschatological loss (Bauckham, WBC 50, 189-90; Davids; Schreiner) has become the settled academic position against an older "moral lapse" reading (Bigg; Mayor).

In-depth research

This is a research paper, so it may be hard to read without scholarly background. It is useful if you want to dig even deeper into this word.

Sources

  • BDAG (Bauer-Danker-Arndt-Gingrich), 3rd ed. (2000), s.v. πταίω, 894lexicon
  • J. P. Louw and E. A. Nida, Greek-English Lexicon of the New Testament Based on Semantic Domains (1988), 88.298 and 21.8lexicon
  • Ceslas Spicq, Theological Lexicon of the New Testament (1994), 3:196-200, s.v. πταίωdictionary
  • Moisés Silva, ed., New International Dictionary of New Testament Theology and Exegesis (NIDNTTE), 2nd ed. (2014), s.v. πταίωdictionary
  • Robert Beekes, Etymological Dictionary of Greek (2010), 1245-1246lexicon
  • Takamitsu Muraoka, A Greek-English Lexicon of the Septuagint (2009), s.v. πταίωlexicon
  • James D. G. Dunn, Romans 9-16, WBC 38B (1988), 652-654commentary
  • Douglas J. Moo, The Epistle to the Romans, NICNT (1996), 686-688commentary
  • Robert Jewett, Romans, Hermeneia (2007), 671-673commentary
  • Dale C. Allison Jr., A Critical and Exegetical Commentary on the Epistle of James, ICC (2013), 407-414, 522-530commentary
  • Luke Timothy Johnson, The Letter of James, AB 37A (1995), 231-232, 254-256commentary
  • Richard J. Bauckham, Jude, 2 Peter, WBC 50 (1983), 189-190commentary
  • Thomas R. Schreiner, 1, 2 Peter, Jude, NAC 37 (2003), 304-306commentary

AI-generated word study · claude-opus-4-8

All attested forms of πταίω

aorist active indicative 3p

ἔπταισαν

Rom 11:11

aorist active subjunctive 2p

πταίσητέ

2Pe 1:10

aorist active subjunctive 3s

πταίσῃ

Jas 2:10

present active indicative 1p

πταίομεν

Jas 3:2

present active indicative 3s

πταίει

Jas 3:2