cagily       
adverb uk/ˈkeɪ.dʒəl.i/ us/ˈkeɪ.dʒəl.i/
 守口如瓶地,讳莫如深地
in a way that shows unwillingness to give information
  Cagily, he said nothing. 他守口如瓶,什么都没说。 
 The caller asked - rather cagily - if we had spoken to Dad. 来电者讳莫如深地问我们是否和爸爸谈过。 
 See: cagey
 - More examples
- She has cagily left the impression that she is more moderate than her husband.
- They laughed, cagily.
- I cagily posed my questions to the experts.