• adj. 突然的，意外的；快速的
• n. 突然发生的事

来自盎格鲁诺曼法语 sudein,改写自拉丁语 subitaneus,来自 subitus,突然的，来自 sub,在下， 向上，-it,走，词源同 exit,itinerary.即向上走来的，引申词义突然走来的，突然的。

sudden

sudden: [13] The etymological notion underlying sudden is of something approaching stealthily or without warning, so that it takes one by surprise. It comes via Anglo-Norman sudein from late Latin subitānus, an alteration of Latin subitāneus ‘sudden’. This was derived from subitus ‘sudden’, an adjectival use of the past participle of subīre ‘approach stealthily’. And subīre was a compound verb formed from the prefix sub-, used here in the sense ‘secretly’, and īre ‘go’ (source of English ambition, exit, issue, etc).
=> ambition, exit, issue

sudden (adj.)

early 14c., sodaine, from Anglo-French sodein or directly from Old French sodain, subdain "immediate, sudden" (Modern French soudain), from Vulgar Latin *subitanus, variant of Latin subitaneus "sudden," from subitus past participle of subire "go under; occur secretly, come or go up stealthily," from sub "up to" (see sub-) + ire "come, go" (see ion). "The present spelling was not finally established till after 1700" [OED].

Noun meaning "that which us sudden, a sudden need or emergency" is from 1550s, obsolete except in phrase all of a sudden first attested 1680s, also of a sudayn (1590s), upon the soden (1550s). Sudden death, tie-breakers in sports, first recorded 1927; earlier in reference to coin tosses (1834). Related: Suddenness.

1. "I think I'll try a hypnotist," I said with sudden resolution.

“我会找催眠师试试，”我突然坚决地说。

来自柯林斯例句

2. He felt a sudden sense of calm, of contentment.

他突然感到一种安宁和满足.

来自柯林斯例句

3. The sudden onset of winter caused havoc with rail and air transport.

冬天的突然降临让铁路和航空运输系统陷入混乱。

来自柯林斯例句

4. A sudden break in the cloud allowed rescuers to spot Michael Benson.

天气的突然放晴帮助救援人员找到了迈克尔·本森。

来自柯林斯例句

5. Wind caught the sudden puff of dust and blew it inland.

风猛地刮起一阵灰尘，将它吹往内陆。

来自柯林斯例句