雲譎波詭 [云谲－诡]

Jyutping wan4 kyut3 bo1 gwai2
Pinyin yún jué bō guǐ

Definitions (Wiktionary)
  1. phrase, idiomatic
    to be unpredictable and ever-changing; to be highly changeable
    (syn.) 波譎雲詭, 波诡云谲, 波詭雲譎, 波谲云诡