Added 9 October 2026
challenging
/ˈt͡ʃæl.ɪn.d͡ʒɪŋ/ adjective
adjective Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about challenging at Wordnik → Where our words come from →
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Requiring full use of your abilities or resources.
ambitious schedule
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Stimulating interest or thought.
a challenging hypothesis
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Disturbingly provocative.
an intriguing smile
Origin
From Middle English chalengynge; equivalent to challenge + -ing.
From Wiktionary, via Kaikki.org (CC BY-SA)