precipitate
prih-SIP-ih-titadjMeaning done suddenly and without careful thought; hasty
Memory hook PRE-CIPIT: rushing in HEADfirst. One raindrop lands on Grandpa’s nose, and he cancels the whole picnic at once without even looking at the sunny sky: his decision is precipitate.
Selling the house after one bad day was a precipitate decision.
In context The coach warned against any precipitate changes after a single loss; she wanted to study the game film carefully before deciding anything.
Similar hasty, rash, impulsive, sudden
Opposite careful, deliberate, considered
From Latin praecipitare, “to throw headlong,” from praeceps (headlong): prae- (forward) + caput (head).