WordReference English-Spanish Dictionary © 2014:

Principal Translations
quejarse v prnlverbo pronominal: Verbo que se conjuga con un pronombre átono ("me", "te", "se") que concuerda con el sujeto ("lavarse", "irse", "enojarse"). (manifestar pena, dolor)  (of pain, discomfort)complain viintransitive verb: Verb not taking a direct object--for example, "She jokes." "He has arrived."
   (make a noise)groan, moan viintransitive verb: Verb not taking a direct object--for example, "She jokes." "He has arrived."
 El enfermo se queja de dolor de cabeza.
 The patient is complaining about a headache.
  She groaned (or: moaned) when they removed the bandage from her leg.This sentence is not a translation of the English sentence.
quejarse v prnlverbo pronominal: Verbo que se conjuga con un pronombre átono ("me", "te", "se") que concuerda con el sujeto ("lavarse", "irse", "enojarse"). (refunfuñar, gruñir)  (of inconvenience, trouble)complain viintransitive verb: Verb not taking a direct object--for example, "She jokes." "He has arrived."
   (informal, US)gripe, carp, bellyache viintransitive verb: Verb not taking a direct object--for example, "She jokes." "He has arrived."
   (informal, UK)moan viintransitive verb: Verb not taking a direct object--for example, "She jokes." "He has arrived."
 Juan se queja de que su vecino hace mucho ruido.
 Juan complains that his neighbor makes a lot of noise.
  He always moans about the cold weather when he travels north.This sentence is not a translation of the English sentence.
 
Additional Translations
quejarse vtrverbo transitivo: Verbo que requiere de un objeto directo ("di la verdad", "encontré una moneda"). (presentar oposición)  (legal: grievance)enter a complaint, file a complaint v exprverbal expression: Phrase with special meaning functioning as verb--for example, "put their heads together," "come to an end."
 El abogado se quejó ante el tribunal.
 The lawyer entered a complaint (or: filed a complaint) in court.
  Is something important missing? Report an error or suggest an improvement.

'quejarse' found in these entries
In the Spanish description:
English:

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