lackadaisical Antonyms

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