to breathe in quickly and repeatedly through the nose, usually because you are crying or because you have a cold

You're sniffling a lot today - have you got a cold? 你今天一直在吸鼻子——是不是感冒了？

an act or sound of sniffling

a slight cold that mainly affects your nose

I had a cold a couple of weeks ago and it's left me with a sniffle. 我几个星期前感冒了，现在依然有些鼻塞。