octuple

 
Pronunciation: /ˈɒktjʊp(ə)l, ɒkˈtjuːp(ə)l/

adjective

[attributive]
  • consisting of eight parts or things.
  • eight times as many or as much: each over-amplified leap or octuple pirouette [in combination]: their album went octuple-platinum

verb

  • make or become eight times as numerous or as large: [with object]: the new town populations have trebled the additions to the rural community, and in the case of Massachusetts have octupled them [no object]: prices doubled and quadruple and octupled

Origin:

early 17th century: from French octuple or Latin octuplus (both adjectives), from octo 'eight' + -plus (as in duplus 'double')