IPA: /ˈstreɪtɪst/
KK: /streɪtɪst/
The most direct or without any curves or bends.
This is the straightest path to the park.
Comparative: straighter
Superlative: straightest
Straightest → It is formed from "straight" (from Old English *streht*, meaning extended in a line) and the superlative suffix "-est" (meaning most). The word "straightest" means the most extended in a line or the least deviated from a straight path.
Think of something that is 'extended in a line' — 'straight' means not curved, and '-est' indicates the highest degree. So, straightest refers to the most direct or least curved path.