Your chin is the part of your face below your lower lip, at the front of your jaw. It helps shape your profile and is often used in expressions and gestures.
“Chin” comes from Old English “cin,” from a Proto-Germanic word related to jaw or chin. It has remained surprisingly stable in form and meaning over many centuries.
Humans have unusually prominent chins compared with other animals, and scientists still debate exactly why. We turned this small bone bump into a big symbol—“chin up” for courage, “take it on the chin” for toughness. Your chin is a tiny piece of bone with a huge emotional job.
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