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impetuous

im·pet·u·ous

impetuous

pronunciation:
ihm pe chu s
features:
Word Explorer
part of speech: adjective
definition: done suddenly and without much thought; impulsive.
She made an impetuous decision to cut off all her hair.
synonyms:
impulsive, rash, spontaneous
antonyms:
cautious
similar words:
abrupt, headlong, nasty, offhand, snap, sudden
derivations: impetuously (adv.), impetuousness (n.)
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  thought