HARMONIOUS
harmonious
(adjective) existing together in harmony; “harmonious family relationships”
harmonious
(adjective) suitable and fitting; “the tailored clothes were harmonious with her military bearing”
harmonious, proportionate, symmetrical
(adjective) exhibiting equivalence or correspondence among constituents of an entity or between different entities
harmonious
(adjective) musically pleasing
Source: WordNet® 3.1
Etymology
Adjective
harmonious (comparative more harmonious, superlative most harmonious)
Showing accord in feeling or action.
Having components pleasingly or appropriately combined.
Melodious; in harmony.
Source: Wiktionary
Har*mo"ni*ous, a. Etym: [Cf. F. harmonieux. See Harmony.]
1. Adapted to each other; having parts proportioned to each other;
symmetrical.
God hath made the intellectual world harmonious and beautiful without
us. Locke.
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.
– Har*mo"ni*ous*ly, adv.
– Har*mo"ni*ous*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition