a.

1. 勤勉的，刻苦的，不辭辛勞的
   She is making painstaking efforts to learn Chinese.

   她在刻苦學習中文。

   Harry is a painstaking student.

   哈里是個肯下苦功的學生。

2. 十分小心的；仔細的；煞費苦心的
   The picture has been cleaned with painstaking care.

   這幅畫已被十分小心地擦乾淨了。

n.

1. 勤勉，刻苦；煞費苦心
   His painstaking to attain his goal in life is praiseworthy.

   他為實現人生目標所下的苦功是值得稱讚的。

adj.