Sisyphean [sis-ə-FEE-ən]

Part of speech: adjective
Origin: Latin, 17th century

1. Denoting or relating to a task that can never be completed.

Examples of sisyphean in a sentence

“Trying to keep my cats from getting into the bag of treats feels like a Sisyphean challenge.”

“Beach cleanup days can feel Sisyphean, but preserving the ecosystem is a worthwhile project.”