Tra từ sniff - Từ điển Oxford Advanced Learner 8th

sniff [sniff sniffs sniffed sniffing] verb, noun BrE [snɪf] NAmE [snɪf]
verb
1. intransitive to breathe air in through your nose in a way that makes a sound, especially when you are crying, have a cold, etc
•We all had colds and couldn't stop sniffing and sneezing.
•She sniffed a little and dabbed at her eyes.
2. transitive, intransitive to breathe air in through the nose in order to discover or enjoy the smell of sth
Syn: ↑smell
•~ sth sniffing the fresh morning air
•to sniff glue
•~ (at sth) The dog sniffed at my shoes.
see also ↑glue-sniffing
3. transitive, intransitive + speech | ~ (sth) to say sth in a complaining or disapproving way
•‘It's hardly what I'd call elegant,’ she sniffed.
Verb forms:

Word Origin:
Middle English: imitative.

Example Bank:
•He sniffed appreciatively. ‘Smells delicious. What is it?’
•She wiped her eyes and sniffed loudly.
•The dog sniffed at his shoes.
•The woman sniffed back her tears.
•He sniffed loudly and continued to weep.
•She sniffed and wiped her nose with a tissue.
Idioms: ↑have a sniff around ▪ ↑not to be sniffed at
Derived: ↑sniff at something ▪ ↑sniff round ▪ ↑sniff round somebody ▪ ↑sniff somebody out

noun
1. countable an act or the sound of sniffing
•She took a deep sniff of the perfume.
•My mother gave a sniff of disapproval.
•His sobs soon turned to sniffs.
2. singular ~ of sth an idea of what sth is like or that sth is going to happen
•The sniff of power went to his head.
•They make threats but back down at the first sniff of trouble.
3. singular ~ of sth a small chance of sth
•She didn't get even a sniff at a medal.

Word Origin:
Middle English: imitative.

Example Bank:
•‘I'm sorry,’ he said between sniffs.
•She gave a loud sniff of disapproval.
•The dog had a good sniff at the bushes around the garden.
•to get a sniff of fresh air
•She held the bottle to her nose and took a good sniff.