1. combine in a pleasant or effective way
harmonize a group of things
To harmonize is a verb used in music indicating adding notes to a melody in order to produce harmony. It can also mean to produce an aesthetically or otherwise pleasing combination. "The artist uses colours which harmonize to create the effect of a summer's day." "The flavours harmonised to create a pleasing dish." If things harmonize together, it means they work well together or are in accord or agreement with each other. "We aim to harmonize policies across all of the zones we are working in."