suave
suave \'swa:v\ \'swa:v-*t-e-\ aj [MF, pleasant, sweet, fr. L suavis - more at SWEET] : POLISHED, URBANE; also : SMOOTHM, POLITIC mean ingratiatingly tactful and well-mannered. SUAVE suggests a specific ability to encourage easy and frictionless dealings with others; URBANE implies high cultivation and poise coming from wide social experience; DIPLOMATIC stresses an ability to deal with ticklish situations tactfully; BLAND emphasizes mildness of manner and absence of irritating qualities; SMOOTH suggests often a deliberately assumed suavity; POLITIC implies shrewd as well as tactful and suave handling of people - suave.ly av SYN syn SUAVE, URBANE, DIPLOMATIC, BLAND, SMOOTH)
Webster's English Dictionary