From Middle English harsk, harisk(e), hask(e), herris. Century derived the term from Old Norse harskr (whence Danish harsk (“rancid”), dialectal Norwegian hersk, Swedish härsk); the Middle English Dictionary derives it from that and Middle Low German harsch (“rough”, literally “hairy”) (whence also German harsch), from haer (“hair”), from Old Saxon hār, from Proto-West Germanic *hār; the Oxford Dictionary of English derives it from Middle Low German alone.