herculean

[ hur-kyuh-lee-uhn, hur-kyoo-lee-uhn ]
/ ˌhɜr kyəˈli ən, hɜrˈkyu li ən /

adjective

requiring the great strength of a Hercules; very hard to perform: Digging the tunnel was a herculean task.
having enormous strength, courage, or size.
(initial capital letter) of or relating to Hercules or his labors.

Origin of herculean

1590–1600; < Latin Hercule(us) of, belonging to Hercules + -an

SYNONYMS FOR herculean

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for herculean

British Dictionary definitions for herculean

herculean

/ (ˌhɜːkjʊˈliːən) /

adjective

requiring tremendous effort, strength, etca herculean task
(sometimes capital) resembling Hercules in strength, courage, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012