Unconscientiously is an adverb that describes someone who behaves without regard for ethics, morals, or standards. Some synonyms for this word include recklessly, carelessly, thoughtlessly, heedlessly, and irresponsibly. These words all indicate a similar disregard for the consequences of one's actions, and they can be used interchangeably with unconscientiously in many contexts. Other synonyms for this term can include negligently, inconsiderately, and impetuously. No matter which synonym you choose, the word suggests an attitude that is cavalier and indifferent to consequences, reflecting a lack of care and responsibility to others.