留一手 [－－－]

Jyutping lau4 jat1 sau2
Pinyin liú yī shǒu

Definitions (CC-CEDICT)
  1. to hold back a trick
  2. not to divulge all one's trade secrets
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）