Added 9 October 2026 herculean adjective Categories: Describing WordsRare Words adjective ! Definition from WordNet 3.1, Princeton University. More about herculean at Wordnik → Where our words come from → Displaying superhuman strength or power. herculean exertions Extremely difficult; requiring the strength of a Hercules. a herculean task Related Words: superhumanpowerfulharddifficulttitanictremendousimmensehugegiganticenormouspainstakingstrenuous Back to today's word