vt.

1. 使烦恼；跟……纠缠不休；不断地找……的岔子[（+for/into）][OZ]
   The cough has been nagging me for some time.

   咳嗽已使我烦恼了一阵子了。

2. （问题等）困扰[（+into）][（+at）]

vi.

1. 不断唠叨；责骂不休
   Can you stop nagging all the time?

   不要老是唠叨行不行？

2. （痛楚等）不断引起苦恼

n.

1. 【口】好唠叨的人（尤指女性）[C]
   Nobody likes to work with a nag.

   谁也不愿与好唠叨的人一起共事。

n.[C]

1. 老马；驽马
   The nag has been with John for so many years that it is hard for him to part from it.

   这匹老马跟随约翰这么多年了，约翰很难与它分离。

2. 【口】马
   Is that your nag?

   那是你的马吗？

3. 矮小马
   I have never seen a nag like this one.

   我从来没见过这样的矮小马。

v.

1. constantly ask (someone) to do something which they are reluctant to do.
2. [often as adj. nagging] be persistently painful or worrying to.

n.

1. a person who nags.
2. a persistent feeling of anxiety:
   he felt a little nag of doubt.

n.