沉渣 [－－]

Jyutping cam4 zaa1
Pinyin chén zhā

Definitions (Wiktionary)
  1. noun, literally
    dregs; residue; dross
  2. noun, figuratively
    dregs of society
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）