Describe a banana. It's yellow, perhaps with some green edges. When peeled, it has a smooth, soft, mushy texture. It tastes sweet, maybe a little creamy.
And it smells like... well, it smells like a banana.
Every sense has its own “lexical field,” a vast palette of dedicated descriptive words for colors, sounds, tastes, and textures. But smell? In English, there are only three dedicated smell words—stinky, fragrant, and musty—and the first two are more about the smeller's subjective experience than about the smelly thing itself.
— Read more at Why Do Most Languages Have So Few Words for Smells? at The Atlantic.