conscientious
con-sci-en-tious / kŏn-shē-ĕn-shəs
adjective 1. influenced by conscience or principals An intelligent and conscientious opposition is a part of loyalty to country. Bainbridge Colby, 1869 – 1950 2. demonstrating great care and attention to details; diligent; careful He who has no taste for order, will be often wrong in his judgment, and seldom considerate or conscientious in his actions. Johann Kaspar Lavater, 1741 - 1801 etymology From a combination of the Latin noun conscientia (consciousness, cognizance, moral sense) and the Latin adjectival suffix -osus (full of). Thank you to Allen Ward for providing this etymology.