English
proterrorist
From pro- + terrorist.
A compound of pro- + terrorist
Proto-Indo-European *pér ‘through’
Proto-Indo-European *pró ‘forwards, before’
Proto-Italic *prō ‘in front of, before’
Latin prō ‘in favor of, on behalf of’
English pro-
Proto-Indo-European *tres- ‘to tremble (with fear)’
…
Old French terreur ‘terror’
Middle French terreur ‘terror’
Middle English terrour ‘a terror; a fright’
English terror
English terrorist
Today it means
adj In favor of terrorism.
Sources
Sources: Wiktionary, “proterrorist”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / proterrorist