couthiest
/ˈkaʊθɪst/Definitions
1. adjective
having a high degree of refinement, courtesy, or culture
“She was the couthiest person at the party, effortlessly navigating conversations with people from different backgrounds.”
2. noun
the quality of being refined, courteous, or cultured
“Her couthiest moments were the ones where she surprised everyone with her profound knowledge of literature.”