You’re likely familiar with the adjective “frivolous,” meaning “not grave or serious in demeanor, purpose, or acts.” “Frivol” is the noun form, created in the mid-19th century as a back-formation of “frivolous.” Both are from the Latin “frivolus,” meaning “silly, empty,” which is likely from the verb “friare,” meaning “to rub, crumble.” Things of a frivolous nature can have a negative connotation, meaning they’re not important, but it can be important to frivol. It’s beneficial to spend some time playing and doing silly things. Look to kids for an example of how to frivol if you need a guide.