diligence, hard work
彼が成功したのは能力と勤勉さのおかげだ。
His success is thanks to his ability and hard work.
彼らには勤勉さが欠けている。
They lack diligence.
彼女の勤勉さは良い見本だ。
Her diligence is a good example.
私は彼の勤勉さをほめた。
I praised him for his diligence.
彼らの成功は、彼らの勤勉さと大いに関係がある。
Their success has a great deal to do with their hard work.
彼の性格には勤勉さがない。
Diligence is not part of his character.
彼らは彼の勤勉さをほめてお世辞を言った。
They praised and flattered him for his diligence.