couth

 
Pronunciation: /kuːθ/
humorous

adjective

  • cultured, refined, and well mannered: it is more couth to hold your shrimp genteelly by the tail when eating

noun

[mass noun]
  • good manners; refinement: he has no couth, no brains and doesn’t know the meaning of the word diplomacy

Derivatives

couthiness

noun

Origin:

late 19th century: back-formation from uncouth