IPA: /ˈnɔɪziəst/
KK: /ˈnɔɪziɪst/
The most loud or disruptive in sound compared to others.
The noisiest part of the city is near the train station.
Comparative: noisier
Superlative: noisiest
Noisiest → It is formed from "noise" (from Old French *noise*, meaning sound or clamor) and the suffix "-iest" (meaning most). The word "noisiest" means the most full of noise or the loudest.
Think of 'noise' as sound or clamor, and remember that 'noisiest' means the most full of noise.
No commonly confused words.