- governed by conscience; controlled by or done according to one's inner sense of what is right; principled: She's a conscientious judge, who does not let personal prejudices influence her decisions.
- careful and painstaking; particular; meticulous; scrupulous: conscientious application to the work at hand.
Origin of conscientious
SynonymsSee more synonyms on Thesaurus.com
Examples from the Web for unconscientious
Often, unconscientious pleasure-seekers roam the roads in their auto.Sex
That woman ought not to be at large—so rich and good-looking and unconscientious!A Cathedral Courtship
Kate Douglas Wiggin
Yet it is one of the most unconscientious diaries ever written.Sophy of Kravonia
I trust that you have given me credit, Mr. Gammon, for offering no vexatious or unconscientious obstacles.Ten Thousand a-Year (Vol. 2)
Nay, but God forbid that any unconscientious advantage should be taken on my behalf!Ten Thousand a-Year. Volume 1.
- involving or taking great care; painstaking; diligent
- governed by or done according to conscience
Word Origin and History for unconscientious
1610s, from Middle French conscientieux (16c.; Modern French consciencieux), from Medieval Latin conscientiosus, from conscientia (see conscience). Related: Conscientiously; conscientiousness.