Sniff

Part of speech: noun (n.)

The act of sniffing; perception by sniffing; that which is taken by sniffing; as, a sniff of air.

Part of speech: verb (v.)

To draw air audibly up the nose; to snuff; -- sometimes done as a gesture of suspicion, offense, or contempt. So ye grow squeamish, gods, and sniff at heaven. M. Arnold.

Part of speech: verb (v.)

1. To draw in with the breath through the nose; as, to sniff the air of the country.

2. To perceive as by sniffing; to snuff, to scent; to smell; as, to sniff danger.