reticently       
adverb  formal uk/ˈret.ɪ.sənt.li/ us/ˈret̬.ə.sənt.li/
 沉默寡言地;不愿交谈地
in a way that shows that you are unwilling to do something or talk about something, for example because you are nervous or being careful
  "I was a prisoner," he said reticently. “我曾是个囚犯,”他默默地说道。 
 Phil spoke reticently. 菲尔缄默地说。 
 See: reticent
 - More examples
 - She began reticently but grew in warmth and confidence.
 - She peered reticently through the window.
 - The small boy reticently climbed into the doctor's chair.