刻苦钻研
Traditional form:
刻苦鑽研
Pinyin (reading):
kèkǔzuānyán
Definitions:
- to study diligently
Characters:
- 刻 - to carve, to engrave; a quarter hour; a moment
- 苦 - bitter; hardship, suffering
- 钻 - diamond; to bore, to drill, to pierce
- 研 - to grind, to rub; to study, to research
Traditional characters: