ex·cul·pate /ˈɛk(ˌ)skəlˌpet, (ˌ)ɛkˈ/
  (vt.)使無罪,分辯,辯解,開脫
  Ex·cul·pate v. t. [imp. & p. p. Exculpated p. pr. & vb. n.. Exculpating (░).]  To clear from alleged fault or guilt; to prove to be guiltless; to relieve of blame; to acquit.
     He exculpated himself from being the author of the heroic epistle.   --Mason.
     I exculpate him further for his writing against me.   --Milman.
  Syn: -- To exonerate; absolve; clear; acquit; excuse; vindicate; justify.
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  exculpate
       v : pronounce not guilty of criminal charges; "The suspect was
           cleared of the murder charges" [syn: acquit, assoil,
           clear, discharge, exonerate] [ant: convict]