decorous

Synonyms: au fait becoming befitting ceremonial ceremonious civilized comely comme il faut conforming conventional correct decent demure de rigueur dignified done elegant fit fitting formal good mannerly meet moral nice polite prim proper punctilious refined respectable right seasonable sedate seemly staid well-behaved

Antonyms: impolite inappropriate indecent indecorous unbecoming unfit unrefined unseemly unsuitable