cacophonous

/kəˈkɑfənəs/
adjective
  1. Having a harsh, unpleasant, or discordant sound; noisy and jarring.
    • The cacophonous noise of the construction site made it impossible to concentrate.
    • Her alarm clock had a cacophonous ring that startled her awake every morning.
    • The orchestra's first rehearsal was cacophonous, with instruments playing out of tune.
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