IPA: /kæˈkɒfənəsli/
KK: /kæˈkɑfənəsli/
In a way that produces a harsh, discordant mixture of sounds.
The band played cacophonously, making it hard to enjoy the music.
Cacophonously → It is formed from "cacophony" (from Greek "kakophonia", where "kakos" means bad and "phone" means voice or sound) and the suffix "-ously" (meaning in a manner). The word "cacophonously" means in a manner that produces a harsh or discordant sound.
Think of 'bad sound' ('kakos' and 'phone') to remember that 'cacophonously' describes something that sounds harsh or unpleasant.
No commonly confused words.