suave in WordNet English dictionary

1. 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  suave  bland 
   
2. having a sophisticated charm
   "a debonair gentleman"
   debonair  debonaire  debonnaire  suave