c. 1400, from Anglo-French pleintif (late 13c.), noun use of Old French plaintif "complaining; wretched, miserable," from plainte (see plaint). Identical with plaintive at first; the form that receded into legal usage retained the older -iff spelling.
实用例句
1. The plaintiff's sole witness, a gambler and layabout, was easily discredited.
原告唯一的证人嗜赌成性，游手好闲，其证词一下子就被推翻了。
来自柯林斯例句
2. The burden of proof lay on the plaintiff to prove negligence.
证明对方犯有疏忽罪的举证责任落在原告身上.
来自《简明英汉词典》
3. The plaintiff is aged 30 and has a normal expectation of life.