Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

V. multiply by four, quadruplicate, biquadrate†. Adj. fourfold, four times; quadrable†, quadrumanous†, quadruple, quadruplicate, quadrible†; fourth. quadrifoliate†, quadrifoliolate†, quadrigeminal†, quadrigeminate†, quadriplanar†, quadriserial†. Adv. four times; in the fourth place, fourthly.