counterguerrilla

noun

coun·​ter·​guer·​ril·​la ˌkau̇n-tər-gə-ˈri-lə 

-gi-,

-gyi-,

-ge-

variants or less commonly counterguerilla

: a guerrilla who is trained to thwart enemy guerrilla operations

Word History

First Known Use

1901, in the meaning defined above