Her grades were 'respectable' [='satisfactory'] but not great.
She makes a 'respectable' [='decent'] salary.
She comes from a very 'respectable' family.
(..) gentlemen, a lie. Which I do not need to point out to you. And so... a quiet, humble, respectable Negro... who has had the unmitigated temerity... to feel sorry for a white woman... has had to put his word (..)1962 To Kill a Mockingbird