死性不改 [－－－－]

Jyutping sei2 sing3 bat1 goi2
Pinyin sǐ xìng bù gǎi

Definitions (CC-CANTO)
  1. stubborn characteristics (idiom)
Definitions (粵典–words.hk)
  1. 語句
    一個​人​唔​肯改​自己​嘅​惡​習​或者​缺點
    to be too stubborn or lazy to change for the better
Definitions (Wiktionary)
  1. phrase
    old habits die hard
Definitions (Kaifangcidian)
  1. 本性難移 – 本性难移
  2. 積習難改 – 积习难改