conscientiousness

US /ˌkɑːn.ʃiˈen.ʃəs.nəs/
UK /ˌkɑːn.ʃiˈen.ʃəs.nəs/
1.

誠実さ

the quality of working hard and being careful:

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His conscientiousness and maturity impressed faculty members.
:
conscientious