nag/ næg /

1.vt.
(go on at) 唠叨

2.vi.
唠叨

3.noun [c] [inf] 
(horse) 马

4.noun [pej] 
(person) 喋喋不休的人

to nag at sb
 [worry,doubt,feeling+] 令某人烦恼
to nag (at) sb to do sth
唠叨某人做某事
to nag sb into doing sth
非叫某人做某事不可
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