conscientious
Definitions
Wishing to do one's work or duty well and thoroughly.
Relating to a person's conscience or sense of right and wrong.
Examples
She is a conscientious student who always double-checks her work before submitting it.
The conscientious employee stayed late to ensure the project met all the quality standards.
Being conscientious about your health habits can lead to a much longer and happier life.
Synonyms
diligent meticulous thorough scrupulous careful assiduous painstaking
Antonyms
careless negligent slapdash remiss indifferent irresponsible lax