Meaning

noun a human limb; technically the part of the superior limb between the shoulder and the elbow but commonly used to refer to the whole superior limb

noun any projection that is thought to resemble a human arm

noun any instrument or instrumentality used in fighting or hunting

originEtymology tree Proto-Indo-European *h₂er- Proto-Indo-European *h₂érmos Proto-Germanic *armaz Proto-West Germanic *arm Old English earm Middle English arm English arm From Middle English arm, from Old English earm (Anglian arm), from Proto-West Germanic *arm, from Proto-Germanic *armaz (“arm”), from Proto-Indo-European *h₂(e)rmos (“a fitting, joint; arm, forequarter”), a suffixed form of *h₂er-…

Etymology from Wiktionary, CC BY-SA 3.0