fourfold

== English == === Alternative forms === four-fold === Etymology === From Middle English fourfold, fourefold, from Old English fēowerfeald. Equivalent to four +‎ -fold. Cognate with Dutch viervoud, Gothic 𐍆𐌹𐌳𐌿𐍂𐍆𐌰𐌻𐌸𐍃 (fidurfalþs). === Pronunciation === (Received Pronunciation) IPA(key): /ˈfɔːfəʊld/ (General American) IPA(key): /ˈfɔɹ.foʊld/ === Adjective === fourfold (not comparable) Four times as great; quadruple. Comprised of four individual members. ==== Synonyms ==== quadruple, quadruplicate ==== Derived terms ==== ==== Translations ==== === Adverb === fourfold (not comparable) By a factor of four. ==== Synonyms ==== quadruply; see also Thesaurus:four times ==== Translations ==== === Verb === fourfold (third-person singular simple present fourfolds, present participle fourfolding, simple past and past participle fourfolded) To increase to four times as much; to multiply by four. ==== Synonyms ==== quadruple, quadruplicate ==== Translations ==== === Noun === fourfold (plural fourfolds) (mathematics) An algebraic variety of degree 4.