Har

wiktionary

ref

From Middle English harre, herre, from Old English heorra(“hinge; cardinal point”), from Proto-Germanic *herzô(“hinge”), from Proto-Indo-European *(s)kerd-(“to move, sway, swing, jump”). Cognate with Scots herre, harr, har(“hinge”), Dutch harre, her, har(“hinge”), Icelandic hjarri(“hinge”), Latin cardō(“hinge”).

Onomatopoeic.