NSW Opportunity Class
Cacophonous
adjective/kuh-KOF-uh-nus/
involving or producing a harsh, discordant mixture of sounds.
In contextThe cacophonous sounds of the city traffic were incessant.
Remember it
Kako (bad) + phone (sound): cacophonous = bad-sound-ous — a harsh, clashing racket.
Use it well
For harsh mixed noise — traffic, band warm-ups, birds at dawn; stronger than plain 'noisy'.