conscientious

(adjective)

adjective

1. characterized by extreme care and great effort

- conscientious application to the work at hand

Similar word(s): careful, painstaking, scrupulous

2. guided by or in accordance with conscience or sense of right and wrong

- a conscientious decision to speak out about injustice

Sentences with conscientious as an adjective:

- He was a thoughtful and conscientious worker.