Antonyms of adj unconscientious

1 sense of unconscientious

Sense 1
unconscientious (vs. conscientious) -- (not conscientious;)

conscientious (vs. unconscientious) -- (guided by or in accordance with conscience or sense of right and wrong; "a conscientious decision to speak out about injustice")

Similarity of adj unconscientious

1 sense of unconscientious

Sense 1
unconscientious (vs. conscientious) -- (not conscientious;)
       => conscienceless, unconscionable -- (lacking a conscience; "a conscienceless villain"; "brash, unprincipled, and conscienceless"; "an unconscionable liar")