rouspéter in English:

Paul grumbled about the money he earned- he’d expected much more.

she always grumbles at the children

You can grumble to neighbours about officials without looking over your shoulder

The clothes shops grumble that all shoppers want is a bargain.

If that happens, remember not to grumble about Moscow's policies.

Webster defines grouse as "to grumble or complain." It is related to the word "grouch." Roget equates the term with "fret, chafe, frown, crab, or pout." The usual synonym for grousing is nagging.

What can your friends predict you will grumble about most?

‘I'm getting old,’ she grumbled.

This action makes me grumble.

I'm saying that if the real thing comes to her, Sekka won't have anything to grumble about.