不期然而然
bù​qī​rán'ér​rán

to happen unexpectedly

  1. 不 bù adverb
    not
    Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings
  2. 期 qī verbnoun
    to hope
    To hope for, expect, or look forward to
  3. 然 rán adverbadjective
    [state]
    Used as a suffix after an adjective or adverb to describe a state or manner, similar to the English suffix "-ly".
  4. 而 ér particleconjunction
    [adverbial linker]
    Connects an adverb-like description to the following verb to show the manner, cause, or basis of an action.
  5. 然 rán adverbadjective
    [state]
    Used as a suffix after an adjective or adverb to describe a state or manner, similar to the English suffix "-ly".