Idiosyncratic (adjective)

1. Peculiar to one person or group and not shared by others; highly individual or personal.
2. Marked by or given to idiosyncrasies; eccentric.

Origin:

The word "idiosyncratic" derived from the greek word "idios" meaning personal and "synkrisis" meaning mixture. it is used to describe something that is peculiar to one person or group and not shared by others.

Examples:

1. He had an idiosyncratic way of dressing, always wearing brightly colored clothes.
2. The movie was idiosyncratic, with a unique and personal style.
3. The artist was known for his idiosyncratic paintings.
4. The book was idiosyncratic and hard to understand.
5. His idiosyncratic behavior made him stand out in the crowd.