boring
decisive, brilliant
An antonym of brilliant is dull.
An antonym for "brilliant" could be "dull." While "brilliant" suggests brightness, intelligence, or exceptional quality, "dull" conveys a lack of luster, interest, or sharpness. Other potential antonyms include "uninspired" or "mediocre," depending on the context in which "brilliant" is used.
Initial
the antonym is a grade as in A+ or B- etc.
The word would be concealment. Concealment is the antonym for display that begins with c.
B
· brilliant
Famous
One option is smart.
Skinny, svelte, skeletonized
beautifulbelievablebrainybrightbravebrilliant