Webster's Revised Unabridged Dictionary · 1913

Sevenfold

Sevenfold , adjective

Repeated seven times; having seven thicknesses; increased to seven times the size or amount.
Sevenfold rage. — Milton

Sevenfold , adverb

Seven times as much or as often.
Whosoever slayeth Cain, vengeance shall be taken on him sevenfold. — Gen. iv. 15