lackadaisical Antonyms

prepossessed tenacious studious strong-minded striving strenuous steely staunch stateful thirsty thrusting vivacious vigorous vehement vaulting unflinching uncompromising unbending tireless springy spirited rigorous resolved pushing purposeful pumped prudent prospective progressive ruthless scrappy solicitous soi-disant so-called single-minded self-seeking self-assertive self-asserting sedulous voracious warlike whole-souled proactive power-hungry powered gung ho flirty all-conquering on the go alive and kicking