Impetuous
/ˌɪˈmpɛtʃwəs/
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Definition
(adj) Making arbitrary decisions, especially in an impulsive and forceful manner.
Sentence Examples
She's so impetuous; I wish she would consider things before acting.
Don't be so impetuous.
CEFR Practice Quiz
Her ____ decision to quit her job without another one lined up surprised all her close friends.