sixfold
From Longman Dictionary of Contemporary Englishsixfoldsix‧fold /ˈsɪksfəʊld $ -foʊld/ adverb formal INCREASE IN NUMBER OR AMOUNTby six times as much or as many Burglaries have increased sixfold. —sixfold adjective a sixfold increase in teenage pregnanciesExamples from the Corpussixfold• The plant has increased its production sixfold.• Mrs Whitehouse reports that the use of the F-word on television has increased sixfold in 1991.• Coal prices rose sixfold, those of electricity, gas and petrol rose fourfold, and public transport fares were doubled.• County's share of New York Stock Exchange trading has grown sixfold, to 1.6%.increased sixfold• Mrs Whitehouse reports that the use of the F-word on television has increased sixfold in 1991.