Antonyms for brilliant
- adjective
Antonyms by meaning
- adj. · splendid
- mediocre, thick, dense, opaque, iniquitous, unutterable, arrant dated, asinine
- adj. · bright
- dark, dull, dull-witted, gruesome
- adj. · ingenious
- slow-witted, half-brained, uncool slang
- adj.
- negative, crapo, purblind formal rare, lumpish rare, caliginous formal dated