discordant
US /dɪˈskɔːr.dənt/
UK /dɪˈskɔːr.dənt/

1.
disagreeing or incongruous
:
•
The committee's views were discordant with the public's opinion.
•
His actions were discordant with his stated beliefs.
2.
(of sounds) harsh and unpleasant due to a lack of harmony
:
•
The orchestra produced a series of discordant notes.
•
The sound of the alarm was loud and discordant.