Solipsistic (adjective)

Of or relating to solipsism; the theory or belief that the self is the only thing that can be known or verified.

Origin:

From the latin solus (alone) and ipse (self), solipsistic refers to the theory or belief that the self is the only thing that can be known or verified.

Examples:

1. He was so solipsistic that he couldn't understand how anyone else could possibly have a different opinion.
2. Her solipsistic musings on the nature of reality made it difficult for her to connect with others.
3. His solipsistic approach to life left him feeling isolated and disconnected.
4. The solipsistic philosophy espoused by the group was met with widespread skepticism.
5. Many found the solipsistic nature of his art to be off-putting and unapproachable.