yān​rán​yī​xiào

to smile sweetly

  1. sweetly and beautifully
    (literary) used to describe a beautiful, sweet, or charming appearance, often referring to a woman's smile
  2. numeralparticle
    [brief action]
    Used between a repeated verb to show that the action is brief, casual, or an attempt.
  3. to smile or laugh
    to have a happy expression on one's face or make sounds expressing joy; to smile; to laugh