grouch n. + Add to list US //ˈɡɹaʊtʃ// UK //ɡɹˈaʊtʃ// grouch SynonymsEtymology Synonyms churlcrankcrosspatchgrumblegrumpscoldOriginMEgrouchen→ENgrouch From Middle English grouchen, variant of grucchen (“to complain, mumble, murmur”). See grutch.