Solution

COMPLAIN

2 clues

Grumble

Word class: Verb
Nature of clue: Synonym
Difficulty: Medium
Sources: Boatload Puzzles

Other solutions to Grumble

Whine

Word class: Verb
Nature of clue: Synonym
Difficulty: Medium
Sources: Boatload Puzzles

Words are categorized by artificial intelligence: there can be mistakes.