vi.
sniff （出声地）吸鼻子；嗤笑
vt.
sniff at - show a lack of interest in or respect for sth 对…嗤之以鼻、不屑一顾

At first he sniffed at her foreign ways.
起初他对她的外国作风嗤之以鼻。

‘You're behaving in an unladylike fashion,’ sniffed Mother.
“你的行为不像淑女，”母亲嗤笑道。

嗤之以鼻的