fourfold

fourfold

English

English numbers ^(edit)

	40
←  3	4	5  →
Cardinal: four     Ordinal: fourth     Latinate ordinal: quartary, quaternary     Adverbial: four times     Multiplier: fourfold     Latinate multiplier: quadruple     Distributive: quadruply     Collective: foursome     Multiuse collective: quadruplet     Greek or Latinate collective: tetrad     Greek collective prefix: tetra-, tessera-     Latinate collective prefix: quadri-     Fractional: quarter, fourth     Latinate fractional prefix: quadrant-     Elemental: quadruplet     Greek prefix: tetarto-     Number of musicians: quartet     Number of years: quadrennium, olympiad

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).

Adjective

fourfold (not comparable)

1. Four times as great; quadruple.
2. Comprised of four individual members.
   • 1895, [Charles Hardy], The Aural System […]‎, page 5:

     Most pupils have a fourfold object in studying a language; they wish to be able to read and write, to speak and to understand it.

Synonyms

• quadruple, quadruplicate

Translations

four times as great

Bulgarian: четворен (četvoren) Czech: čtyřnásobný (cs) Dutch: viervoudig (nl) Finnish: nelinkertainen Galician: catro veces, cuádruple (gl) Gothic: 𐍆𐌹𐌳𐌿𐍂𐍆𐌰𐌻𐌸𐍃 (fidurfalþs) Hindi: चहुरा (hi) m (cahurā), चौघरा (hi) m (caughrā), पाव (hi) m (pāv), चौगुना (hi) (caugunā) Hungarian: négyszer akkora Latin: quadruplus, quadruplex (la) Plautdietsch: feafach Tagalog: makaapat Telugu: నాలుగింతలు (te) (nālugintalu)

comprised of four individual members

Dutch: vierledig, vierdelig (nl) Hindi: चौघरा (hi) (caughrā), चहुरा (hi) (cahurā), पाव (hi) (pāv) Hungarian: négyrészes, négyes (hu) Swedish: fyrfaldig (sv)

Adverb

fourfold (not comparable)

1. by a factor of four
   • 1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], OCLC 964384981, 2 Samuel 12:6:

     And he shall restore the Lambe fourefold, because he did this thing, and because he had no pittie.

Synonyms

• quadruply; see also Thesaurus:four times

Translations

by a factor of four

Bulgarian: четирикратно (bg) (četirikratno), четворно (bg) (četvorno) Czech: čtyřnásobně Finnish: nelinkertaisesti Hindi: चहुरा (hi) m (cahurā), चौघरा (hi) m (caughrā), पाव (hi) m (pāv), चौगुना (hi) (caugunā) Hungarian: négyszeresen, négyszeresére

Verb

fourfold (third-person singular simple present fourfolds, present participle fourfolding, simple past and past participle fourfolded)

1. to increase to four times as much; to multiply by four

Synonyms

• quadruple, quadruplicate

Translations

increase to four times as much — See also translations at quadruple#Verb

Catalan: quadruplicar (ca) Dutch: verviervoudigen Finnish: nelinkertaistaa French: quadrupler (fr) German: vervierfachen (de), vierfachen (de) Hindi: चौगुना करना (caugunā karnā) Italian: quadruplicare (it) Portuguese: quadruplicar (pt) Russian: учетверять (ru) (učetverjatʹ) Spanish: cuadruplicar (es) Swedish: fyrdubbla (sv), fyrfaldiga (sv)

Noun

fourfold (plural fourfolds)

1. (mathematics) An algebraic variety of degree 4.
   • 2015, Brent Pym, “Elliptic singularities on log symplectic manifolds and Feigin--Odesskii Poisson brackets”, in arXiv‎:

     Our main application is to the classification of Poisson brackets on Fano fourfolds.