Harmonious /(här*mō"nĭ*ŭs)/

Har·mo·ni·ous

Harmonious

a.
  1. Adapted to each other; having parts proportioned to each other; symmetrical.
    God hath made the intellectual world harmonious and beautiful without us.
  2. Acting together to a common end; agreeing in action or feeling; living in peace and friendship; as, an harmonious family.
  3. Vocally or musically concordant; agreeably consonant; symphonious.