Ответ смотрим в хорошем словаре: Main Entry: 1arm Pronunciation: \ˈдrm\ Function: noun Etymology: Middle English, from Old English earm; akin to Latin armus shoulder, Sanskrit īrma arm Date: before 12th century 1 : a human upper limb; especially : the part between the shoulder and the wrist 2 : something like or corresponding to an arm: as a : the forelimb of a vertebrate b : a limb of an invertebrate animal c : a branch or lateral shoot of a plant d : a slender part of a structure, machine, or an instrument projecting from a main part, axis, or fulcrum e : the end of a ship's yard; also : the part of an anchor from the crown to the fluke — see anchor illustration f : any of the usually two parts of a chromosome lateral to the centromere 3 : an inlet of water (as from the sea) 4 : a narrow extension of a larger area, mass, or group 5 : power, might 6 : a support (as on a chair) for the elbow and forearm 7 : sleeve 8 : the ability to throw or pitch a ball well; also : a player having such ability 9 : a functional division of a group, organization, institution, or activity the logistical arm of the air force — arm·less \ˈдrm-ləs\ adjective — arm·like \-ˌlīk\ adjective — arm in arm : with arms linked together
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