the heel: the hard back of the foot on a person or an animal, the low point where the body is most easily caught or struck
The heel is the part of the body you cannot see and cannot guard. In the Bible it is where a snake strikes, where a hidden trap closes, and where a newborn hand takes hold. Nothing about the word itself is sinister. The scenes the writers put it in are.
That is why the heel turns up at the hinge of so many stories. Esau's twin is born gripping one, and his name, יַעֲקֹב, sounds like this word. Hebrew went on to build a verb out of it (עָקַב) meaning to grab someone by the heel, and so to trip them up or cheat them. The noun itself never accuses anyone; it simply names the place where a person gets grabbed.
A few passages stretch the plain word into a picture that is easy to miss. Because the heel is low, hidden, and behind you, naming it can be an insult, a sign of ambush, or a discreet way of pointing at a body a conqueror has stripped bare. English "heel" will not carry any of that on its own, so the surrounding scene has to do the work.
Nuances
What the unique phrase "he has made his heel great against me" in Psalm 41:9 pictures.
- contestedA gesture of open contempt performed by a table companion who has broken faith with the psalmist.; Kraus, H.-J. Psalms 1-59: A Continental Commentary. Trans. H. C. Oswald. Minneapolis: Fortress, 1988. Pp. 434, 480.
- contestedA kicking or trampling image, as an animal lifts its hoof against someone.; Craigie, P. C. Psalms 1-50. WBC 19. Waco: Word, 1983. P. 320.
- contestedA verbal overtone, so that the friend has supplanted or tripped up the psalmist rather than merely insulted him.; Goldingay, J. Psalms. 3 vols. BCOTWP. Grand Rapids: Baker, 2006-2008.
Whether "your heels have suffered violence" in Jeremiah 13:22 speaks literally of bared feet or is a veiled way of describing sexual violence against Jerusalem, pictured as an adulterous woman.
- majorityA euphemism: the surrounding language of uncovered skirts and exposed shame makes a reference to the body beneath nearly unavoidable.; Holladay, W. L. Jeremiah 1. Hermeneia. Philadelphia: Fortress, 1986. Pp. 415-16.; McKane, W. A Critical and Exegetical Commentary on Jeremiah. Vol. 1: I-XXV. ICC. Edinburgh: T&T Clark, 1986. Pp. 306-08.; Lundbom, J. R. Jeremiah 1-20. AB 21A. New York: Doubleday, 1999. Pp. 685-86.
- minorityLiteral: the bare heels of captives driven off into exile without sandals.; Calvin, J. Commentaries on the Book of the Prophet Jeremiah, and other older commentators.