| 1 | English | terrorist | A person, group, or organization that uses... |
| 2 | English | Terror | — |
| 3 | Middle English | terrour | — |
| 4 | Middle French | terreur | terror |
| 5 | Old French | terreur | terror |
| 6 | Latin | terror | a dread, terror, great fear, alarm, panic; an... |
| 7 | Latin | faciō | — |
| 8 | Latin | -torium | nominative neuter singular of -tōrius; accusative... |
| 9 | Latin | -tōrius | — |
| 10 | Latin | -tor | -er |
| 11 | Proto-Italic | -tōr | — |
| 12 | Proto-Indo-European | -tōr | Derives agent nouns from verbs, denoting someone... |
| 13 | Proto-Indo-European | -tor-s | — |