臨深履薄 [临－－－]

Jyutping lam4 sam1 lei5 bok6
Pinyin lín shēn lǚ bó

Definitions (CC-CANTO)
  1. always anxious and fearful; wading in deep water and treading on thin ice; to proceed with extreme caution
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）