inquiry/ ɪn'kwaɪərɪ /

1.noun [c] 
(question) 询问

2.noun
(about advertisement) 咨询

3.noun [c] 
(investigation) 调查

4.noun [u] [政治ICE] 
质询

to make inquiries
进行调查
public inquiry
公开调查
to hold an inquiry into sth
对某事进行调查
a court of inquiry
调查庭