decuple
An amount multiplied by ten.
The gold coin of the law of 1818 is of four denominations; the decuple of 30 ducats, the half-decuple, ...
Where it comes from
From Middle English decuple, from Middle French décuple, from Late Latin decuplus (“tenfold”), from Latin decem (“ten”), and plicō (“fold”).
Adapted from the Wiktionary entry decuple (CC BY-SA 4.0).