1. over- "outer" + board "side of a ship".
2. 含义:outer of the side of a ship, over the side of a ship.
3. 也就是越过船舷向外。
4. 由此也引申出了引申义:过度、过分(超过了常规的、正常的界限,都越出船舷了,很显然就越出界限了).
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英语词源
overboard (adv.)
"over the side of a ship," Old English ofor bord, from over + bord "side of a ship" (see board (n.2)). Figurative sense of "excessively, beyond one's means" (especially in phrase go overboard) first attested 1931 in Damon Runyon.
权威例句
1. He had jumped overboard in New York harbor and swum to shore.
他在纽约港跳下船,游上了岸。
2. His sailing instructor fell overboard and drowned during a lesson.
他的航海教练在一次训练课时从船上失足跌入水中,溺水身亡。
3. Women sometimes damage their skin by going overboard with abrasive cleansers.
女性有时因过度使用磨砂膏而损伤了皮肤。
4. They had thrown their neutrality overboard in the crisis.
他们在这场危机中丢弃了中立立场。
5. Mary has gone overboard for some new Eastern religions.