grumble
US /ˈɡrʌm.bəl/
UK /ˈɡrʌm.bəl/
1.
mopperen
to complain about someone or something in an annoyed way:
:
•
She spent the evening grumbling to me about her job.
1.
mopperen
a complaint:
:
•
When the teacher assigned extra homework, she heard a few grumbles from the kids.