難以為繼 [难－为继]

Jyutping naan4 ji5 wai4 gai3
Pinyin nán yǐ wéi jì

Definitions (CC-CANTO)
  1. difficult to continue; unsustainable
Definitions (Wiktionary)
  1. phrase, idiomatic
    difficult to sustain; unsustainable
    (syn.) 难乎为继, 難乎為繼
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）