Four times as great or many
English: quadruple, fourfold, four-fold
fourfoldEnglish
fourfold, four-fold, quadruple, four times, quadruplex
Adjective
Having four units or components
English: quadruple, quadruplicate, quadruplex, fourfold, four-fold
Adverb
By a factor of four
English: fourfold, four times