verb

1. To express feelings of pain, dissatisfaction, or resentment.

   “Joe was always complaining about the noise made by his neighbours.”

2. To make a formal accusation or bring a formal charge.

   “They've complained about me to the police again.”

3. To creak or squeak, as a timber or wheel.

   “the complaining bed-springs”

Synonyms: beef, bitch, gripe, grouse, grumble, grump, kvetch, moan