impetuous (adj) – given to impulsive or rash action; having great impetus or violent force
BREAKDOWN: IM- (into, on) + PET- (seek) + -OUS (full of)
— impetuosity is the quality of making impulsive or rash action; forcefulness, fury, or vehemence
This word is built on the root PET-, which means to seek, ask, or strive.
Common PET- words include appetite, competent, competition, petition, and repeat.
More esoteric PET- words include appetent and petulance.