octuply
/ɒktˈʌpli/Definitions
1. verb
to multiply or have eight times as many
“The company has octupled its profits this year.”
2. noun
a number eight times as great as a given number
“The octupled amount of the investment is now in our account.”
3. adverb
to a degree eight times as great as a given degree
“The new policy will octuply the effort to reduce pollution.”