yán​zhī​bù​yù

to not forewarn

  1. 言 yán verbadverb
    to say
    to speak; to talk; to state or tell
  2. 之 zhī pronoun
    it
    Used only in the object position to refer to a person or thing already mentioned, meaning "him", "her", "it", or "them".
  3. 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
  4. 预 預 yù adverbverb
    prior
    (bound form) beforehand; in advance; prior (used as an adjective or adverb before a verb)