impetuous
im-PECH-oo-usadjMeaning acting quickly and rashly, without thought
Memory hook IMPETUS: a headlong RUSH. Dev races down the dock and leaps into the lake without checking how cold it is. Splash! Brrr! His headlong leap was impetuous.
The impetuous knight charged across the river without checking how deep it was.
In context Dev’s impetuous decision to quit the team after one bad game surprised everyone, and by the next morning he was asking the coach to let him back.
Similar rash, hasty, impulsive, headlong
Opposite cautious, careful, deliberate
From Latin impetuosus, from impetus, “a rush, an attack.”