How to sign: having more than one decidedly dissimilar aspects or qualities; public preaching and private influence"- R.W.Emerson "a double (or dual) role for an actor"; "the office of a clergyman is twofold; "every episode has its double and treble meaning"-Frederic;
Twofold in ASLWatch how to sign Twofold in American Sign Language
How to sign: consisting of or involving two parts or components usually in pairs "an egg with a double yolk"; "a double (binary) star"; "double doors"; "dual controls for pilot and copilot"; "duple (or double) time consists of two (or a multiple of two) beats to a me;
dual in ASLWatch how to sign dual in American Sign Language