(rash) adjective
1. Acting without due caution or regard of consequences; reckless; precipitate.
2. Exhibiting recklessness or precipitancy.
3. Obs. Quick; speedy. See synonyms under IMPETUOUS, IMPRUDENT. [ME rasch. Akin to Du. & G rasch quick.]
—rash′ly adverb
—rash′ness noun

(rash) noun
A superficial eruption of the skin, often localized. [? <F rache <OF rasque. See RASCAL.]

(rash) noun Scot.
A rush; bulrush.