怎知 [－－]

Jyutping zam2 zi1
Pinyin zěn zhī

Definitions (Wiktionary)
  1. adv
    who would have thought; little did one know; how was one to know
  2. phrase, rhetoric
    how would [someone] know; [someone] doesn't know
    (syn.) 点知, 誰料, 谁料, 哪知, 點知, 曷知