IPA: /hɑːˈmɒn.aɪz/
KK: /hɑrˈmənˌaɪz/
To make different things work together in a pleasing way or to bring them into agreement.
The musicians worked hard to harmonise their voices during the performance.
Past: harmonised
Past Participle: harmonised
Harmonise → It is formed from "harmonia" (from Greek ἁρμονία, meaning agreement or concord) and the suffix "-ise" (meaning to make or to cause to be). The word "harmonise" means to make things agree or work together in a pleasing way.
Think of 'agreement' ('harmonia') and remember that to 'harmonise' means to make things work together in a pleasing way.