countercountermeasure

noun

coun·​ter·​coun·​ter·​mea·​sure ˌkau̇n-tər-ˈkau̇n-tər-ˌme-zhər 

-ˌmā-

variants or counter-countermeasure or counter-counter-measure

plural countercountermeasures or counter-countermeasures or counter-counter-measures

: an action or device designed to negate or offset a countermeasure

especially : a military system or device intended to block a sensing mechanism (such as a radar detector) that was intended to counteract another sensing mechanism (such as radar)

They have made a massive investment in electronic counter-countermeasures, as well as lethal and non-lethal countermeasures.

—Deborah M. Kyle et al.

Word History

First Known Use

1944, in the meaning defined above