rouspéter signifie anglais

grumble [grumbled, grumbling, grumbles]▼◼◼◼(to murmur or mutter with discontent)
verb
[UK: ˈɡrʌm.bl̩] [US: ˈɡrʌm.bl̩]

bitch [bitched, bitching, bitches]▼◼◼◼(complain (about something) spitefully)
verb
[UK: bɪtʃ] [US: ˈbɪtʃ]

bleat [bleated, bleating, bleats]▼(informal: to complain)
verb
[UK: bliːt] [US: bliːt]