redoublement
/ˌriːˈdʌblm(ə)nt/ /rɪˈdʌblm(ə)nt/noun
An act or the action of doubling, increasing, or renewing something.
Origin
Early 17th century; earliest use found in Randle Cotgrave (fl. 1587–?1630), lexicographer. From French redoublement action of redoubling, state of something which is redoubled, exacerbation of a disease from redoubler + -ment.