Sisyphean
/ˌsɪsɪˈfiːən/
endlessly laborious and futile
Sisyphean in a sentence
“The Sisyphean task of inbox zero never ends.”
Origin of Sisyphean
From Sisyphus, condemned to roll a boulder uphill forever in Hades
Related Words
Pyrrhic victory
a victory that comes at devastating cost
Achilles' heel
a fatal weakness despite overall strength
Herculean
requiring tremendous strength or effort
Promethean
daringly creative or innovative, often at great risk
Odyssey
a long, eventful journey or experience
Trojan horse
something that appears benign but contains hidden danger