sniff

To sniff means to draw air in through your nose, usually in a short, quick way, to notice a smell. A dog might sniff the ground for a scent, or you might sniff a flower because it smells nice. But it is not only about pleasant smells. You might sniff the air if something seems wrong, like smoke in the kitchen, or sniff back tears when you are trying not to cry. It can also be the small sound someone makes through the nose when they have a cold or are upset.

Think of a dog at the park, nose to the ground, checking every step. Or picture someone lifting a cup and taking a quick breath through the nose to see whether the milk has gone bad. That is sniffing in action, a small everyday act that helps us check the world around us.

The act of sniffing is more than just breathing through your nose. It is a short, quick breath in, usually taken to notice, check, or investigate a smell. It can be gentle, like sniffing a rose, or more focused, like a dog sniffing out a hidden trail.

As a verb, "sniff" names the action itself: "She sniffed the air, trying to work out where the sweet smell was coming from." But the word also has uses beyond smell. You can sniff at something, meaning you react in a cold or dismissive way because you do not respect it or do not think much of it: "He sniffed at her suggestion and turned away." You can also sniff back tears, which describes the small nose-breaths people make when they are trying to control their feelings.

The word can also be a noun. A sniff is the small sound or quick breath itself: "There was a quiet sniff from the corner as she tried not to cry."

The word has been in English for a long time and likely began as a sound-based word that copied the noise of the action itself. We often connect it with animals because they use smell so well, but people do it all the time too, whether they are enjoying perfume, checking for a gas leak, fighting back tears, or showing disapproval. So while it may seem like a very small action, "sniff" can tell a story about curiosity, caution, emotion, or attitude.