the word 'terrorize' is a modern english formation, directly combining the noun 'terror' with the productive verb-forming suffix '-ize'. its core component, 'terror', originates from latin terror, derived from the verb terrēre, meaning 'to frighten, to terrify'. this latin root itself can be traced further back to the proto-indo-european base tres-, meaning 'to tremble', which is also the ancestor of words like 'tremor' and 'tremble'. the logic of the word is transparent: to '-ize' is to 'make or cause to be', thus 'terrorize' literally means 'to cause to be in a state of terror', evolving from the ancient concept of trembling fear to describe the deliberate act of instilling such fear for a purpose.

Structure: terror (extreme fear) + ize (verb-forming suffix) terror (from latin terror, meaning 'great fear, dread, alarm'), ize (from greek -izein via latin -izare, a suffix forming verbs meaning 'to make, to become, to subject to').