苦心孤詣 [－－－诣]

Jyutping fu2 sam1 gu1 ngai6
Pinyin kǔ xīn gū yì

Definitions (CC-CEDICT)
  1. to make painstaking efforts (idiom); after much trouble
  2. to work hard at sth
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）
Examples (粵典–words.hk)
  1. Cantonese
    苦心孤诣
    苦心孤詣
    fu2 sam1 gu1 ngai6
    • to make painstaking efforts