frivolous

Meaning

Adjective

• Silly, especially at an inappropriate time or in an inappropriate manner.
• Of little weight or importance; not worth notice; slight.
• Having no reasonable prospect of success because its claim is without merit, lacking a supporting legal or factual basis, while the filing party is, or should be, aware of this.

Origin

• From Latin frīvolus ("silly, empty, trifling, frivolous, worthless"), with the ending modified to match -ous.