Augean is an adjective that means extremely difficult.
Our word of the day is a reference to Augean stable, the cleansing of which was one of the labors of Hercules. According to the legend, the stable had gone uncleansed for thirty years. In some contexts, Augean can mean filthy. But it usually means extremely difficult.
Melanie was faced with the Augean task of putting little Mike to sleep. He’s such a rambunctious kid that no amount of effort will calm him down.