terrorista
/teroˈɾista/ · B1 · adj
terrorist, terroristic
terror + -ista (-ist): one who deals in terror, same build as English
From Latin terrere, to frighten, plus the suffix -ista, which matches English -ist. The form ends in -a for both genders: el terrorista, la terrorista. It works as a noun and as an adjective, as in un ataque terrorista.