貪婪無厭 [贪－无厌]

Jyutping taam1 laam4 mou4 jim3
Pinyin tān lán wú yàn

Definitions (CC-CEDICT)
  1. avaricious and insatiable (idiom); greedy and never satisfied
Definitions (Wiktionary)
  1. phrase, idiomatic
    avaricious; greedy; not able to settle for less