fourfold

Four times as great; quadruple.

Comprised of four individual members.

Most pupils have a fourfold object in studying a language; they wish to be able to read and write, to speak and to understand it.

By a factor of four.

And he shall restore the Lambe fourefold, because he did this thing, and because he had no pittie.

To increase to four times as much; to multiply by four.