• airy, breezy, colloquial, easy, free and easy, informal, off-hand, shirt-sleeve, shirttail, unceremonious, unselfconscious
• airily, breezily, coolly, in an easy manner, off-hand, with great ease of manners
• bluntness, ease, easiness, informality, swagger
• with great ease of manners
• to feel at home with sy
• to be at ease in society, to feel at ease in society