the.com/heel bone

means The calcaneus — the large bone forming the back of the foot that bears your weight and takes the impact every time your heel strikes the ground.

from 'Heel' traces back to Old English hēla, itself from a Germanic root related to 'ham' or 'hock' — the general idea of the back part of the foot or leg. 'Bone' comes from Old English bān, a sturdy Germanic word that's barely changed in a thousand years. The anatomical name, calcaneus, comes from Latin calx, meaning 'heel' — the same root that gives us 'calcaneal' and, more distantly, words tied to kicking or striking with the foot.