the.com/teat

means The nipple-like projection — on a mammal's breast or udder, or on a baby bottle — through which milk flows.

from From Old English 'tit' or a related Germanic form, part of a very old family of short, blunt words (tit, teat, titty) that popped up independently across Germanic languages to name the same obvious anatomical thing. 'Teat' itself likely arrived in English partly reinforced by Old French 'tete,' which traces back to the same ancient Germanic root — so French and English were, in a sense, borrowing from cousins. The word's bluntness isn't an accident; it's one of those primal, nursery-level terms humans coined early and never bothered to dress up.