What does conscientiously mean?
Conscientiously is an adverb describing action performed with great care, diligence, and a strong sense of duty. Someone who works conscientiously attends thoroughly to detail, follows rules and obligations faithfully, and takes their responsibilities seriously rather than cutting corners. The word derives from 'conscience', so it can also carry a moral dimension: acting conscientiously may mean being guided by a strict sense of what is right, as when a person conscientiously refuses to do something they believe is wrong. In everyday usage it most often praises thoroughness — a student who conscientiously revises, an accountant who conscientiously audits every entry. Its tone is formal to neutral, and its connotation is admiring: to describe someone as working conscientiously is to vouch for their reliability and integrity. It pairs naturally with verbs of work, study, compliance, and care, making it a valuable word for precise, respectful praise of diligent behaviour.
adverbIn a manner showing great care, diligence, and attention to duty; done with a scrupulous regard for doing what is right or thorough.
- With diligent, thorough attention to detail and duty.
- With moral scrupulousness; guided by a strict sense of right and wrong.
"She conscientiously checked every figure in the report before submitting it to the board."
"He conscientiously recorded every expense, down to the smallest taxi fare."
"As a conscientious objector, she conscientiously refused on principle to bear arms."
The word 'conscientiously' carries 'conscience' inside it — every time you say it, you're literally saying someone works with their conscience switched on.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of conscientiously
Conscientiously stems from the Latin 'conscientia', meaning knowledge shared with oneself or moral awareness, formed from 'con-' ('with') and 'scire' ('to know'). The term entered English via the adjective 'conscientious' and its adverbial form in the early modern period, around the 17th century, when questions of religious conscience were prominent. Cognates include 'conscience' itself and 'conscious', all tracing back to the same Latin root.
Related word forms
How conscientiously is actually used
Formal-to-neutral register; common in professional and workplace contexts. Carries an admiring connotation of reliability and integrity. The second sense, tied explicitly to moral principle (as in conscientious objection), is less common than the general sense of diligent thoroughness.
Easily confused with conscientiously
'Consciously' means with awareness or deliberate intention, while 'conscientiously' means with careful diligence and moral scrupulousness — one is about awareness, the other about dutiful care.