IPA: /ˈbiːmiːəst/
KK: /ˈbimiɪst/
The most bright or cheerful, often used to describe a smile or expression that shows happiness.
Her beamiest smile lit up the entire room.
Comparative: beamer
Superlative: beamiest
Beamiest → It is formed from "beam" (from Old English *beama*, meaning a tree or a ray of light) and "-iest" (a superlative suffix indicating the most). The word "beamiest" means having the most beams, often referring to brightness or radiance.
Think of 'beam' as a ray of light, and remember that 'beamiest' means the most radiant or bright.