harmonise

/ˈhɑrmənaɪz/
verb
  1. To sing or play music in harmony; to add notes that sound good with a melody.
    • The two guitars harmonised perfectly during the solo.
    • He can harmonise any tune by ear.
    • The choir learned to harmonise beautifully with the lead singer.
  2. To make things consistent, compatible, or work well together.
    • We need to harmonise our schedules so everyone can attend the meeting.
    • The company worked to harmonise its policies across all branches.
    • The designer harmonised the colors to create a unified look.
  3. To be in agreement or peaceful accord.
    • The team's skills harmonised to produce an excellent result.
    • Their opinions harmonised after a long discussion.
    • The different groups harmonised their efforts for the charity event.