Webster's English Dictionary

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complaint

com.plaint \k*m-'pla-nt\ n [ME compleynte, fr. MF complainte, fr. OF, fr. 
   complaindre] 1: expression of grief, pain, or resentment  2a: that 
   concerning which one complains  2b: a bodily ailment or disease  3: a 
   formal allegation against a party