不可勝言 [－－胜－]

Jyutping bat1 ho2 sing3 jin4
Pinyin bù kě shèng yán

Definitions (CC-CEDICT)
  1. inexpressible (idiom)
  2. beyond description
Definitions (Wiktionary)
  1. phrase, idiomatic
    cannot be expressed in words; there are no words to describe it