conscientious

[kon-shee-en-shuhs, kon-see-]
adjective
1.
controlled by or done according to one's inner sense of what is right; governed by conscience; principled: a conscientious judge.
2.
careful and painstaking; particular; meticulous; scrupulous: conscientious application to the work at hand.

Origin:
1605–15; < Medieval Latin conscientiōsus, equivalent to Latin conscienti(a) conscience + -ōsus -ous

conscientiously, adverb
conscientiousness, noun
hyperconscientious, adjective
hyperconscientiously, adverb
hyperconscientiousness, noun
nonconscientious, adjective
nonconscientiously, adverb
nonconscientiousness, noun
overconscientious, adjective
overconscientiously, adverb
overconscientiousness, noun
quasi-conscientious, adjective
quasi-conscientiously, adverb
unconscientious, adjective
unconscientiously, adverb
unconscientiousness, noun


1. just, upright, honest, faithful, devoted, dedicated. 2. See painstaking.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
conscientious (ˌkɒnʃɪˈɛnʃəs)
 
adj
1.  involving or taking great care; painstaking; diligent
2.  governed by or done according to conscience
 
consci'entiously
 
adv
 
consci'entiousness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

conscientious
1610s, from Fr. conscientieux (16c.), from M.L. conscientiosus, from conscientia (see conscience). Related: Conscientiously (1660); conscientiousness (1630s).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Conscientious, ethical journalists from all media and specialties strive to
  serve the public with thoroughness and honesty.
Being an informed and conscientious citizen is important.
Some instructors are conscientious in evaluating students' papers and providing
  constructive feedback.
Encounter cultural diversity while remaining a conscientious and responsible
  traveler.
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