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English definition of “complain of sth”

complain of sth

phrasal verb with complain
 
 
/kəmˈpleɪn/ verb [I]
B1 to tell other people that something is making you feel ill: She's been complaining of a headache all day.Not fit and healthyThin or slender (of people)
(Definition of complain of sth from the Cambridge Learners Dictionary © Cambridge University Press)
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