More about Augean
The English adjective Augean comes via Latin Augēus “of Augeas” (an adjective used only of King Augeas’ stables), from the proper name Augēās (mentioned in Latin only for the dung in his stables), from Greek Augeíās. Augeíās, whose name may be related to the adjective augḗeis “bright-eyed, clear-sighted,” a derivative of augḗ “light of the sun, ray, beam,” was the king of Elis (in the western Peloponnesus); his stables, filled with 3,000 immortal cattle, had not been cleaned for over 30 years. The cattle, moreover, were not only immortal but also divinely robust and healthy and therefore produced a prodigious amount of dung. Hercules’ fifth task was to clean the dung in Augeas’ stables, a task that was deliberately meant to be humiliating and impossible. Hercules cleansed the stables by diverting the river Alpheus through them. Augean entered English at the end of the 16th century.