• adj. 轻率的；鲁莽的；不顾后果的
• n. [皮肤] 皮疹；突然大量出现的事物
• n. (Rash)人名；(英、以、阿拉伯)拉什

可能来自俗拉丁语*rasicare,刮，擦，来自拉丁语 radere,刮，擦，词源同 rat,eraser.

rash

rash: English has two words rash. The older, ‘impetuous’ [14], probably comes from an unrecorded Old English *ræsc, which together with its relatives German rasch ‘quick’ and Swedish rask ‘active, vigorous’ goes back to a prehistoric Germanic *raskuz. This was probably derived from the same base as produced English rather, which originally meant ‘more quickly’. Rash ‘skin condition’ [18] may have been borrowed from the now obsolete French rache, a descendant of Old French rasche, whose Old Northern French counterpart *rasque is the possible source of English rascal.
=> rather; rascal

rash (adj.)

late 14c., "nimble, quick, vigorous" (early 14c. as a surname), a Scottish and northern word, perhaps from Old English -ræsc (as in ligræsc "flash of lightning") or one of its Germanic cognates, from Proto-Germanic *raskuz (cognates: Middle Low German rasch, Middle Dutch rasc "quick, swift," German rasch "quick, fast"). Related to Old English horsc "quick-witted." Sense of "reckless, impetuous, heedless of consequences" is attested from c. 1500. Related: Rashly; rashness.

rash (n.)

"eruption of small red spots on skin," 1709, perhaps from French rache "a sore" (Old French rasche "rash, scurf"), from Vulgar Latin *rasicare "to scrape" (also source of Old Provençal rascar, Spanish rascar "to scrape, scratch," Italian raschina "itch"), from Latin rasus "scraped," past participle of radere "to scrape" (see raze). The connecting notion would be of itching. Figurative sense of "any sudden outbreak or proliferation" first recorded 1820.

1. He may break out in a rash when he eats these nuts.

他吃了这些坚果可能会长皮疹。

来自柯林斯例句

2. Don't do anything rash until the feel-ings subside.

在冷静下来之前不要鲁莽行事。

来自柯林斯例句

3. Mr. Major is making no rash promises.

梅杰先生没有作出轻率的承诺。

来自柯林斯例句

4. I woke up covered in a rash.

我醒来时长了一身皮疹。

来自《权威词典》

5. My skin has broken out in an itchy rash.

我的皮肤上突然长出一片让人发痒的皮疹.

来自《简明英汉词典》