哪知

nǎzhī
  1. who would have imagined?
  2. unexpectedly

CEDICT

Entry Composition

=1 哪 nǎ
  1. how
  2. which
=1 哪 na (emphatic sentence-final particle, used instead of 啊 a after a word ending in "n")
2 知 zhī
  1. to know
  2. to be aware