根こんを詰つめる

expression, ichidan verb

persevere; keep at it; work hard without rest

Implies pushing oneself to the limit, often to the point of exhaustion. Used when someone works doggedly despite fatigue.

See also: 根 (こん)

• 彼かれは根こんを詰つめて働はたらきすぎて、体からだを壊こわした。

  He worked too hard without rest and ruined his health.

• 試し験けん前まえは根こんを詰つめて勉べん強きょうする学がく生せいが多おおい。

  Many students study relentlessly before exams.