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Definitions

Herculean

[hur-kyuh-lee-uhn, hur-kyoo-lee-uhn] / ˌhɜr kyəˈli ən, hɜrˈkyu li ən /
ADJECTIVE
powerful, strong
Synonyms
WEAK
almighty backbreaking colossal courageous forceful gargantuan gigantic hard heroic huge impressive laborious mighty strenuous tough vigorous

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

This tie is far from over, even if it is going to take a herculean effort from Newcastle at the Nou Camp next week.

From BBC • Mar. 10, 2026

On Friday, SpaceX asked U.S. regulators for approval to launch up to 1 million satellites as orbital data centers, which would be a herculean effort.

From MarketWatch • Feb. 2, 2026

That change is harder still in organizations rooted in old forms of predigital content delivery: changing form and content at the same time is herculean.

From The Wall Street Journal • Oct. 20, 2025

Convincing Columbia Records to support his new work was a herculean struggle for Springsteen.

From Los Angeles Times • Aug. 4, 2025

Eight months ago it was a herculean effort to walk myself and my IV stand to the bathroom.

From "The Running Dream" by Wendelin Van Draanen

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.