The thicker end of something; the buttocks; to push or strike with the head or horns.
From Old French 'bout' meaning 'end, extremity', ultimately from Germanic roots. The anatomical sense developed from the idea of the 'end' of the torso. The verb form comes from the action of animals striking with their heads.
This versatile word connects cigarette butts, rifle butts, and human butts through the simple concept of 'the end part.' The verb 'to butt heads' literally describes what rams do, but metaphorically captures human stubbornness perfectly.
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