plaintiff
词根词缀：
complain v. 抱怨
com 加强 + plain 捶胸，引申为“抱怨” → 抱怨
complaint n. 抱怨
com 加强 + plaint 抱怨，complain的名词 → 抱怨
plaint n. 悲叹
plaintiff n. 原告
plaint 捶胸，引申为“抱怨” + iff 表名词 → 原告
plaintive adj. 痛苦的，伤心的
plain 捶胸，引申为“抱怨” + tive …的 → 捶胸顿足 → 伤心的
数据来源：新东方英语词汇速记大全
相关例句：
The plaintiff is of legally interested in revocation or alteration of the specific administrative action.
与撤销或者变更具体行政行为有法律上利害关系的。
By Our Country Official's Plaintiff Qualifications in Administrative Proceedings
论我国公务员在行政诉讼中的原告资格
The Theoretical and Systematical Development of the Qualification of Plaintiff in China's Administrative Litigation
我国行政诉讼原告资格理论与制度发展
If the buyer is the plaintiff, the arbitration shall take place in Beijing.
若买方是申诉人，仲裁将在北京进行。
The defendant made an opposing claim against the plaintiff by saying that the latter had accused him falsely.
被告反诉原告诬陷。
Standing involves the relationship between the plaintiff and the issues in the case.
起诉权包含了原告与个案中所提出的问题之间的关系。