single-minded Antonyms

wobbly slipshod skeptical reckless questioning perfunctory passive nonchalant negligent listless sluggish torpid unsure work-shy ambivalent unambitious unassertive undecided vacillating unconcerned uncertain lethargic lazy languid halting fickle faltering doubtful dispassionate disinterested conflicted casual careless haphazard idle lackadaisical irresolute infirm indolent indifferent indecisive inattentive inactive impassive apathetic