IPA: /ˈbrɪtəlɪst/
KK: /ˈbrɪtəlɪst/
The most likely to break or shatter easily when pressure is applied.
The glass was the brittlest material in the experiment, breaking at the slightest touch.
Comparative: brittler
Superlative: brittlest
Brittlest → It is formed from "brittle" (from Old English "brytel", meaning easily broken) and the superlative suffix "-est" (meaning most). The word "brittlest" means the most easily broken or fragile.
Think of something that is the "most easily broken" — that's what "brittlest" means, indicating a high level of fragility.
No commonly confused words.