complainant

名词 complainant:

1. a person who brings an action in a court of law
   同义词：plaintiff

com.plain.ant

n.Law （名词）【法律】
A party that makes a complaint or files a formal charge, as in a court of law; a plaintiff.
原告：在法律诉讼中正式把请求或文件提交诉讼的一方当事人；原告