يُغَنّي أو يَعْزِف بانْسِجام وتوافُق

harmonise(verb)

to sing or play musical instruments in harmony.

يُنَسِّق ، يخْلِقُ إنْسِجاما

harmonise(verb)

to add different parts to (a melody) to form harmonies.

يتناسَق، يَتَوافَق، يَتلائَم

harmonise(verb)

to (cause to) be in harmony or agreement

The colours in this room harmonize nicely.