grumble

Universal Words verb, noun verb 1 ~ (at / to sb) (about / at sb/sth) to complain about sb/sth in a bad-tempered way: [V] She's always grumbling to me about how badly she's treated at work. * [Vspeech] 'I'll just have to do it myself,' he grumbled. * [Vthat] They kept grumbling that they were cold. 2 [V] to make a deep continuous sound SYNRUMBLE: Thunder grumbled in the distance. grumbler noun noun 1 ~ (about sth)