diligent

• adj.勤勉な、勤勉な、勤勉な
• n.（勤勉な）人の名前；（仏）Diligeant

勤勉、勤勉から。

diligent

diligent: [14] The underlying meaning of diligent is ‘loving’. It comes via Old French diligent from the present participial stem of Latin dīligere ‘esteem highly, love’. This was a compound verb formed from the prefix dis- ‘apart’ and legere ‘choose’ (source of English elect, neglect, and select), and so originally meant literally ‘single out’. It gradually passed semantically via ‘love’ to ‘attentiveness’, ‘carefulness’, and finally ‘steady effort’.
=> elect, neglect, select

diligent (adj.)

mid-14c., from Old French diligent (14c.), from Latin diligentem "attentive, assiduous" (see diligence). Related: Diligently.

1. He was careful and diligent .I was all over the place.

彼は細心で勤勉で、私はぼんやりしています。

2.The historical research was impressively diligent .

この歴史研究は非常に真剣で徹底的である。

3.A spotless stove told us that his mother is a diligent housekeeper.

ストーブの汚れがないことは、母親が勤勉な主婦であることを示している。

4.He is the more diligent of the two boys.

彼はこの2人の男の子の中で比較的勉強している1人です。

5.She is diligent and keeps herself busy all the time.

彼女はまめで、しばらく暇がない。