Usage patterns
〈物〉の匂いを嗅ぐto sniff/smell something
〈事〉の匂いを感じるto sense a hint/aura of something
I sensed something suspicious about his story.
匂いが漂うa smell wafts/drifts through the air
The smell of coffee is drifting through the room.
匂いが強い/きついthe smell is strong/intense
This fish has a strong smell.
匂いを消すto get rid of a smell
I got rid of the smell in the room with a deodorizer.
Expressions
匂いがするsmell; have a smell; smell of