IPA: //ʌnˈjuːʒuəl//
KK: /ʌnˈjuːʒuəl/
Not common or ordinary; different from what is typical or expected.
The artist has an unusual style that sets her apart from others.
Comparative: more unusual
Superlative: most unusual
Unusual → It is formed from "un-" (meaning not) and "usual" (from Latin "usus", meaning use or custom). The word "unusual" means not customary or not commonly encountered.
Think of 'not' ('un-') being added to 'usual', which helps you remember that 'unusual' describes something that is not common or typical.