IPA: /ˈbreɪniɪst/
KK: /ˈbrenɪəst/
The most intelligent or clever person among a group.
She is the brainiest student in the class, always getting the highest grades.
Comparative: brainier
Superlative: brainiest
Brainiest → It is formed from "brain" (from Old English "brægen", meaning the organ of thought) and "-iest" (a superlative suffix meaning most). The word "brainiest" means possessing the most intelligence or being the most intellectual.
Think of the word 'brain' as the center of thought and intelligence, and remember that 'brainiest' means the one who has the most of that intelligence.