IPA: /ˈfliːtɪst/
KK: /flitɪst/
The fastest or quickest in speed.
The fleetest runner in the race won the gold medal.
Comparative: flee
Superlative: fleetest
Fleetest → It is formed from "fleet" (from Old English *fleot*, meaning swift or quick) and the superlative suffix "-est" (meaning most). The word "fleetest" means the most swift or quick.
Think of 'fleet' meaning swift, and when you add '-est', it indicates the highest degree of swiftness. So, fleetest means the most swift.
No commonly confused words.