1 [I,T] nag (at) sb to continuously complain to sb about his/her behaviour or to ask him/her to do sth many times 不停地抱怨；纠缠不休 · My parents are always nagging (at) me to work harder. 父母老是埋怨我读书不够用功。

2 [T] to worry or irritate sb continuously 不断使人担心或生气: a nagging doubt/headache 令人困扰的疑团；恼人的头痛