滴水石穿 [－－－－]

Jyutping dik6 seoi2 sek6 cyun1
Pinyin dī shuǐ shí chuān

Definitions (CC-CEDICT)
  1. dripping water penetrates the stone (idiom); constant perseverance yields success
  2. You can achieve your aim if you try hard without giving up.
  3. Persistent effort overcomes any difficulty.