jettison

• n. 投弃；投弃货物
• vt. 投弃（船舶遇难时投弃货物以为减轻负载）

来自中古英语jetteson,抛弃，抛入水中，来自古法语getaison,抛弃，来自拉丁语jactare,来自jacere,扔，投掷，词源同project,eject.-aison,名词后缀，词源同-tion,action.

jettison

jettison: [15] Etymologically, to jettison something is to ‘throw’ it overboard. Like jet, as in ‘jet engine’, the word comes from Latin jactāre ‘throw’. The abstract noun derived from this was jactātiō, which entered English via Anglo-Norman getteson. It was used for the ‘action of throwing cargo overboard, especially in order to lighten a ship’, but it was not converted to its familiar modern role, as a verb, until as recently as the 19th century. The contracted form jetson, later jetsam, emerged in the 16th century, and later came to be used for such jettisoned material washed ashore.
=> jet, jctsam

jettison (v.)

1848, from jettison (n.) "act of throwing overboard" to lighten a ship. This noun was an 18c. Marine Insurance writers' restoration of the earlier form and original sense of the 15c. word that had become jetsam, probably because jetsam had taken on a sense of "things cast overboard" and an unambiguous word was needed for "act of throwing overboard."

Middle English jetteson (n.) "act of throwing overboard" is from Anglo-French getteson, from Old French getaison "act of throwing (goods overboard)," especially to lighten a ship in distress, from Late Latin iactionem (nominative iactatio) "act of throwing," noun of action from past participle stem of iectare "toss about" (see jet (v.)). Related: Jettisoned.

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2. Should NASA jettison the shuttle and station right away?

nasa是否现在就该放弃太空梭与太空站的计画 呢 ?

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3. Sometimes you need to jettison unhealthy cargo.

有时你必须抛弃不好的货物.

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4. We jettison an unworkable plan.

我们放弃难实行的计划.

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5. Repeat, jettison Synchro Cannon modules immediately.

重复, 立刻抛弃同步炮模块.

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