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Added 7 October 2026

laborious

/ləˈbɔːɹiəs/ adjective

In Latin: labōriōsus Wiktionary

adjective Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about laborious at Wordnik → Where our words come from →

Characterized by effort to the point of exhaustion; especially physical effort.
worked their arduous way up the mining valley

Origin

From Old French laborios, from Latin laboriosus. By surface analysis, labor + -ious

From Wiktionary, via Kaikki.org (CC BY-SA)

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