toil, diligent, as much as possible

Radicals

• 努力【どりょく】
  effort, exertion, endeavour, endeavor, hard work, striving
• 努める【つとめる】
  to endeavor (to do), to endeavour, to try hard, to work hard, to strive, to make an effort, to exert oneself, to devote oneself, to be committed (to doing)