not be inferior to, be no less than
彼女はお母さんに少しも劣らず美しい。
She is every bit as beautiful as her mother.
彼は彼女に劣らず勤勉である。
He is no less diligent than she is.
君は彼女に、勝るとも劣らずかわいい。
You’re every bit as cute as she is.
彼は誰にも負けず劣らず正直な少年だ。
He is a boy who is every bit as honest as anyone else.
彼は父に勝るとも劣らず利口だ。
He is every bit as clever as his father.