IPA: /ˈbraɪtə/
KK: /ˈbraɪtər/
Having more light or being more vivid than something else.
The sun is brighter today than it was yesterday.
Brighter → It is formed from "bright" (from Old English "beorht", meaning shining or radiant) and "-er" (a comparative suffix meaning more). The word "brighter" means more shining or having more light than something else.
Think of something that is 'more shining' — 'bright' means shining, and '-er' indicates a comparison, so brighter means it shines more.