| Date: | 1500-1600 |
| Origin: | Probably from Old French grommeler, from Middle Dutch grommen |
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grum‧ble

1 [intransitive and transitive] to keep complaining in an unhappy way [= moan]
'This is boring,' Kathleen grumbled.
'This is boring,' Kathleen grumbled.2 [intransitive] to make a low continuous sound [= rumble]:
Thunder grumbled overhead.
Thunder grumbled overhead.3 used to say that you are fairly healthy and happy :
'How are you today?' 'Mustn't grumble.'
mustn't/can't grumble
British English spoken
'How are you today?' 'Mustn't grumble.' —grumble noun [countable]
the usual grumbles about pay
the usual grumbles about pay