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rash1

[rash] /ræʃ/
adjective, rasher, rashest.
1.
acting or tending to act too hastily or without due consideration.
2.
characterized by or showing too great haste or lack of consideration:
rash promises.
Origin
1350-1400
1350-1400; Middle English; cognate with Dutch, German rasch quick, brisk, Old Norse rǫskr brave
Related forms
rashly, adverb
rashness, noun
Synonyms
1. hasty, impetuous, reckless, venturous, incautious, precipitate, indiscreet, foolhardy.
Antonyms
1. cautious.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for rashest

rash1

/ræʃ/
adjective
1.
acting without due consideration or thought; impetuous
2.
characterized by or resulting from excessive haste or impetuosity: a rash word
Derived Forms
rashly, adverb
rashness, noun
Word Origin
C14: from Old High German rasc hurried, clever; related to Old Norse roskr brave

rash2

/ræʃ/
noun
1.
(pathol) any skin eruption
2.
a series of unpleasant and unexpected occurrences: a rash of forest fires
Derived Forms
rashlike, adjective
Word Origin
C18: from Old French rasche, from raschier to scratch, from Latin rādere to scrape
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for rashest

rash

adj.

late 14c., "nimble, quick, vigorous" (early 14c. as a surname), a Scottish and northern word, perhaps from Old English -ræsc (cf. ligræsc "flash of lightning") or one of its Germanic cognates, from Proto-Germanic *raskuz (cf. 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.

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.

Online Etymology Dictionary, © 2010 Douglas Harper
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rashest in Medicine

rash (rāsh)
n.
A skin eruption.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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