suave

(s) having a sophisticated charm
- a debonair gentleman
debonair, debonaire, debonnaire,
(s) smoothly agreeable and courteous with a degree of sophistication
- he was too politic to quarrel with so important a personage
- the manager pacified the customer with a smooth apology for the error
politic, smooth, bland,

debonair debonaire debonnaire politic smooth bland

suavely suaveness