rash

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rash1 / rash/ • adj. displaying or proceeding from a lack of careful consideration of the possible consequences of an action: it would be extremely rash to make such an assumption a rash decision.DERIVATIVES: rash·ly adv.rash·ness n.rash2 • n. an area of reddening of a person's skin, sometimes with raised spots, appearing esp. as a result of allergy or illness. ∎  a series of things of the same type, esp. when unpleasant or undesirable, occurring or appearing one after the other within a short space of time: a rash of auto accidents.

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