Meaning of こつこつ in Japanese

Definition of こつこつ

こつこつ(kotsukotsu) · コツコツ(kotsukotsu)

こつこつはたらく(kotsukotsuhataraku) · コツコツはたらく(kotsukotsuhataraku) 【こつこつ働く ·コツコツ働く】

(exp, v5k) to work hard; to toil; to moil; to keep one's nose to the grindstone; to slug away

彼かれはこつこつ事実じじつを調べていた。

He was patiently digging for facts.

Someone is tapping at the door.

こつこつやれば受験じゅけんに受かるうかるだろう。

Stick at it, and you'll pass the exam.