不期然而然 bù qī rán ér rán

DEFINITIONS

  1. happen unexpectedly
  2. turn out contrary to one's expectations

CHARACTERS

不 bù no, not; un-; negative prefix
期 qī period of time; date; time limit
然 rán yes, certainly; pledge, promise
而 ér and; and then; and yet; but
然 rán yes, certainly; pledge, promise