mutter

Universal Words verb, noun verb 1 ~ (sth) (to sb / yourself) (about sth) to speak or say sth in a quiet voice that is difficult to hear, especially because you are annoyed about sth: [Vspeech] 'How dare she,' he muttered under his breath. * [V] She just sat there muttering to herself. * [VN] I muttered something about needing to get back to work. [also Vthat] 2 ~ (about sth) to complain about sth, without saying publicly what you think: [V] Workers continued to mutter about the management. [also Vthat] noun [usuallysing.] a quiet sound or words that are difficult to hear: the soft mutter of voices