impulsive
im-PUL-sivadjMeaning acting suddenly without thinking first
Memory hook im-PULSE-ive: decided in one PULSE. Ivy spots a giant teddy bear at the checkout and buys it in one heartbeat, without a thought about where it will fit. Her purchase is impulsive.
In an impulsive moment, Jonah dyed his hair green the night before school photos.
In context Ivy’s purchase was impulsive: she saw the giant teddy bear at the checkout and bought it without a single thought about where it would fit in her tiny room.
Similar rash, hasty, spontaneous, reckless
Opposite cautious, deliberate, careful
From Latin impulsus, “a push,” from impellere, “to push on”: im (on) + pellere (to drive).