A unicycle has one wheel.
A uniform is one basic outfit worn by a group.
A unicorn has one horn.
And when something is unique, it’s one of a kind.
Not kinda different. Not rare. One of a kind. You can’t have degrees of uniqueness. There’s no such thing as “a little unique” or “very unique.” Something that’s unique is all by itself.
It’s easy to see why people get confused. “Unusual” and “uncommon” also start with “un.” But think about what those words mean: not usual and not common. “Unique” doesn’t mean that something is not ique.
So go ahead and call something a little unusual or very uncommon. But if it’s unique, it’s unique, period.