quadruple

 
Pronunciation: /ˈkwɒdrʊp(ə)l, kwɒˈdruːp(ə)l/

adjective

[attributive]
  • consisting of four parts or elements: a quadruple murder
  • consisting of four times as much or as many as usual: a quadruple vodka
  • (of time in music) having four beats in a bar.

verb

  • increase or be increased fourfold: [no object]: oil prices quadrupled in the 1970s

noun

  • a quadruple number or amount.

Derivatives

quadruplicity

Pronunciation: /-ˈplɪsɪti/
noun

quadruply

adverb

Origin:

late Middle English (as a verb): via French from Latin quadruplus, from quadru- 'four' + -plus as in duplus (see duple)