acquit         
verb uk/əˈkwɪt/ us/əˈkwɪt/ -tt-
 [ T often passive ]宣判…无罪 
to decide officially in a law court that someone is not guilty of a particular crime
 acquit someone of something She was acquitted of all the charges against her. 她被宣判无罪,所有对其指控皆不成立。 
acquit someone on something Five months ago he was acquitted on a shoplifting charge. 5个月前,法庭宣判对他在商店盗窃货物的指控不成立。 
 Compare: convict verb
 acquit yourselfformal (在困难的情况下)表现出色
to do better than expected in a difficult situation
  I thought that he acquitted himself admirably in today's meeting. 我认为他在今天会议上的表现非常不错。 
 If Holmes acquits herself well in today's race, she may earn a place in the national team.
 The three starting forwards acquitted themselves quite well in last night's game.