(of persons or their manner, speech, etc.) smoothly agreeable or polite; agreeably or blandly urbane.

adjective

awkward , clumsy , unpolished , unsophisticated

adjective

affable , agreeable , bland , civilized , cordial , courteous , courtly , cultivated , cultured , diplomatic , distingu , fulsome , genial , glib , gracious , ingratiating , obliging , oily * , pleasant , pleasing , polished , polite , politic , refined , smooth-tongued , sociable , soft * , soft-spoken , sophisticated , unctuous , urbane , well-bred , worldly , smooth , charming , civil , debonair , mannered , slick , svelte , tactful