harmonious
adj. B2 Upper Intermediate US //hɑɹˈmoʊniəs// UK //hɑːmˈəʊnɪəs// har·mo·nious
adj. describing things that go together perfectly or people who get along without fighting.
adj. characterised by agreement in feeling, action, or sound; forming a pleasing or consistent whole. Often used to describe social relationships or aesthetic arrangements.
The team worked in a harmonious way to finish the project.
The interior designer chose a harmonious color palette of soft blues and greens to create a relaxing bedroom.
The treaty aimed to establish a more harmonious relationship between the neighboring nations after decades of border disputes and economic competition.
From Middle French harmonieux; by surface analysis, harmony + -ous.
Usage
Typically follows a linking verb like 'be' or 'become', or precedes the noun it modifies.