(s)bright, smartcharacterized by quickness and ease in learning“some children are brighter in one subject than another”, “smart children talk earlier than the average”
(s)fresh, impertinent, impudent, overbold, smart, saucy, sassy, wiseimproperly forward or bold“don't be fresh with me”, “impertinent of a child to lecture a grownup”, “an impudent boy given to insulting strangers”, “Don't get wise with me!”