to be short of something needed, to lack or run low; and so to make something or someone fall short, to deprive
The picture behind this word is simple: a portion has been broken off a whole, so the whole comes up short. From that one image the word reaches across a surprisingly wide range. Flood waters dwindle as they drain away, a jar of oil does not run out, a poor man goes without what he needs, and a fool has no sense.
Most often it describes a person or thing going without something needed: food, water, oil, money, any good thing. Its most memorable uses are negative. "I shall not lack" (Psalm 23:1), "you have lacked nothing" in the wilderness (Deuteronomy 2:7), "those who seek the LORD lack no good thing" (Psalm 34:10). In these the real point is not the lack but its removal: under God's care the shortfall is made up, and the same word that names covenant curse elsewhere (Deuteronomy 28) here names provision.
The word can also be turned outward, to mean making someone else fall short, that is, depriving them: the scoundrel who leaves the thirsty without a drink (Isaiah 32:6), the driven man who keeps his own soul from good (Ecclesiastes 4:8). And it can describe a plain shortfall in counting or measure, as when the righteous "fall short by five" (Genesis 18:28) or the gatherer of manna "came up short" of no one (Exodus 16:18).
Nuances
What kind of deficiency "his sense fails him" (literally "his heart is short") names in this and the related Proverbs idiom: a failure of intellect or of moral character.
- contestedA cognitive deficit: the person is mindless, lacking the intelligence to act rightly.; Michael V. Fox, Proverbs 1-9, Anchor Yale Bible 18A
- contestedA moral deficit: the person is not unintelligent but lacks moral discernment and character.; Bruce K. Waltke, The Book of Proverbs, Chapters 1-15, NICOT
- contestedThe modern split between intellect and morality is foreign to the Hebrew view of the inner person; the deficit is a morally chargeable failure of thought.; Hans Walter Wolff, Anthropology of the Old Testament