Brilliant

//ˈbɹɪljənt//

Antonyms for "brilliant" (15 found)

Adjective(14 words)

caliginous crappo dark dense dull dull-witted half-brained lumpish opaque purblind slow on the uptake slow-witted thick uncool

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.