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The Collaborative International Dictionary
Cacophonious

Cacophonic \Cac`o*phon"ic\, Cacophonical \Cac`o*phon"ic*al\, Cacophonous \Ca*coph"o*nous\, Cacophonious \Cac`o*pho"ni*ous\, a. Harsh-sounding.

Wiktionary
cacophonious

a. cacophonous; harsh-sounding; unmusical