quadruplus, quadruplex angolul

fourfold▼(four times as great)
adjective
[UK: ˈfɔː.fəʊld] [US: ˈfɔːfoʊld]

quadruple▼(being four times as long, as big or as many of something)
adjective
[UK: kwɒ.ˈdruːp.l̩] [US: kwaˈdruːp.l̩]