v. 1 mumble, murmur, grunt He was muttering something to himself that I didn't catch 2 grumble, complain, Colloq grouch, grouse, Brit chunter She has been muttering about cuts in the postal service ever since I can remember
MUTTER
Meaning of MUTTER in English
Oxford thesaurus English vocab. Английский словарь Оксфорд тезаурус. 2012