impeccable manners• His parents were keen on the work ethic and equipped him with impeccable manners.• Richard was tall for his age and personable, with impeccable manners and a strong sense of occasion.• He had impeccable manners that somehow always reminded you of an older, bygone age.• Valda and Varvara adore officers, their impeccable manners, their formal bearing, their white uniforms.
Originimpeccable
(1500-1600)Latinimpeccabilis, from peccare“to do bad things”