IPA: /ˈslɛndərɪst/
KK: /ˈslɛndərɪst/
The thinnest or most narrow in size or shape.
She wore the slenderest dress at the party, which made her look elegant.
Comparative: slender
Superlative: slenderest
Slenderest → It is formed from "slender" (from Old English *slendrian*, meaning to be thin or lean) and the superlative suffix "-est" (meaning most). The word "slenderest" means the most thin or lean among a group.
Think of 'slender' as describing something thin, and when you add '-est', it means the thinnest of all.