yǎo​rén​gǒu​r​bù​lù​chǐ

a biting dog does not show its teeth

  1. to bite
    To bite or nip with the teeth; to bark or snap at; to sting or bite like an insect.
  2. person
    person; people; human being; a human
  3. dog
    dog; canines in general
  4. r particleaffix
    [erhua suffix]
    A suffix attached to a word to form a retroflex ending, often indicating a small size, a sense of familiarity, or turning a word into a noun.
  5. 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
  6. to grin
    to grin; to show one's teeth