conscientious

a.认真的，勤勤恳恳的；诚心诚意的

connective, connexion, conning-tower, connivance, connive, conniving, connoisseur, connotation, connotative, connote, connubial, conquer, conqueror, conquest, conquistador, Conrad Hilton, consanguinity, conscience, conscience money, conscience-stricken, conscientious objector, conscientiously, conscientiousness, conscious, consciously, consciousness, conscript, conscription, consecrate, consecration, consecutive, consecutively, consensus, consent, consequence, consequent, consequential, consequentially, consequently, conservancy,