complain · verb I /kəmˈpleɪn/Full view
B1 to say that something is wrong or that you are annoyed about something
Dictionary examples:

Lots of people have complained about the noise.

He's always complaining!

He complained that she never listened to him.

If the service was so bad why didn't you complain to the manager?

Learner example:

If we are bad, they complain to our manager or they tell the head office. (Preliminary English Test; B1; Turkish)

complain of sth
B1 to tell other people that something is making you feel ill
Dictionary example:

She's been complaining of a headache all day.

Learner example:

I asked her if he [had] complained of any pains or aches? (Preliminary English Test; B1; Spanish)

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