a. & adv. [ AS. feówerfeold. ] Four times; quadruple;
He shall restore the lamb fourfold. 2 Sam. xii. 6. [ 1913 Webster ]
n. Four times as many or as much. [ 1913 Webster ]
v. t. To make four times as much or as many, as an assessment; to quadruple. [ 1913 Webster ]