IPA: /ˈluːsɪst/
KK: /ˈlusɪst/
The most relaxed or not tight; having the least amount of tension or restriction.
She wore the loosest dress at the party, which made her feel very comfortable.
Comparative: looser
Superlative: loosest
Loosest → It is formed from "loose" (from Old English *losian*, meaning to lose or set free) and the suffix "-est" (meaning the most). The word "loosest" means the most free or not tightly held.
Think of something that is 'set free' ('loose') and remember that 'loosest' means the most free or not tightly held.
No commonly confused words.