counter-terrorism

Etymology tree
Proto-Indo-European *ḱe?
Proto-Indo-European *ḱóm
Proto-Italic *kom
Proto-Italic *kom-
Proto-Indo-European *-teros
Proto-Italic *-teros
Proto-Italic *komterosder.
Proto-Italic *komterād
Latin contrāder.
Old French contre-
Anglo-Norman countre-bor.
Middle English counter-
English counter-
Proto-Indo-European *tres-
Proto-Indo-European *-yeti
Proto-Indo-European *-éyeti
Proto-Indo-European *troséyeti
Proto-Italic *trozeō
Latin terreō
Proto-Indo-European *-os
Proto-Indo-European *-s
Proto-Indo-European *-ōs
Proto-Italic *-ōs
Latin -or
Latin terrorbor.
Old French terreur
Middle French terreur
French terreur
Proto-Indo-European *-id-
Proto-Indo-European *-yéti
Proto-Indo-European *-idyéti
Proto-Hellenic *-íďďō
Ancient Greek -ῐ́ζω (-ĭ́zō)
Proto-Indo-European *-mos
Proto-Indo-European *-mós
Ancient Greek -μός (-mós)
Ancient Greek -ῐσμός (-ĭsmós)der.
Latin -ismusbor.
French -isme
French terrorisme
English terrorism
English counter-terrorism
From counter- + terrorism.