Regardless

1. (a.) Having no regard; heedless; careless; as, regardless of life, consequences, dignity.

2. (a.) Not regarded; slighted.

Thesaurus Entries

airy, aloof, anyhow, anyway, anywise, apathetic, at all, at all costs, at all events, at any cost, at any rate, ataractic, behindhand, blase, bored, by any means, careless, casual, cursory, degage, delinquent, derelict, despite, detached, devil-may-care, disinterested, dispassionate, disregardant, disregardful, distant, distracted, distrait, easygoing, even with, flippant, forgetful, free and easy, heedless, however, impassive, in any case, in any event, in any way, in despite of, in spite of, inadvertent, inattentive, inconsiderate, incurious, indifferent, inexcitable, inobservant, insouciant, irregardless, irrespective of, lackadaisical, lax, lazy, listless, mindless, neglectful, negligent, nevertheless, no matter what, nohow, nonchalant, nonetheless, notwithstanding, oblivious, offhand, perfunctory, phlegmatic, pococurante, reckless, regardless of, regardless of cost, remiss, respectless, slack, spite of, stolid, tactless, thoughtless, turned-off, unanxious, unconcerned, undiplomatic, undiscriminating, unheedful, unheeding, uninquiring, uninterested, uninvolved, unmarking, unmindful, unnoticing, unnoting, unobservant, unobserving, unprepared, unready, unremarking, unsolicitous, untactful, unthinking, with, withdrawn