1175-1225;Middle Englishhurlen, equivalent to hur- (perhaps akin to hurry) + -len-le; akin to Low Germanhurreln to toss, Frisianhurreln to roar (said of the wind), dialectal Germanhurlen to roll, rumble (said of thunder)
early 13c., hurlen, probably related to Low Ger. hurreln "to throw, to dash," and E.Fris. hurreln "to roar, to bluster." OED suggests all are from onomatopoeic *hurr "expressing rapid motion;" see also hurry. For difference between hurl and hurtle (which apparently were confused since early M.E.) see hurtle.