名詞 deponent:

1. a person who testifies or gives a deposition
   同義詞：testifier, deposer

de.po.nent

adj.Abbr. dep.,dpt.Grammar （形容詞）縮寫 dep.,dpt.【語法】
Being a verb of active meaning but passive or middle form, as certain Latin and Greek verbs.
異相的：具有主動意義，但同時又有被動或中間形式的動詞的（就如同某些拉丁語和希臘語中的動詞）
n.Abbr. dep.,dpt.（名詞）縮寫 dep.,dpt.
Grammar A deponent verb.
【語法】 異相動詞
Law One who testifies under oath, especially in writing.
【法律】 宣誓證人：寫下宣誓書的證人

來源：
Middle English
中古英語
from Latin dôpônôns dôpônent- [present participle of] dôpônere [to put down] * see depone
源自 拉丁語 dôpônôns dôpônent- [] dôpônere的現在分詞 [放下] *參見 depone