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armhole

Today it means: A human armpit. Full definition →

Middle English arme hole

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The story

Middle English · inherited fromarme hole
English todayarmhole

From Middle English arme hole, armehole, arm hole, arm-hole, armhole, arm-hool(e), armole, harmehole; equivalent to arm + hole.

Etymology from Wiktionary, CC BY-SA 4.0.