English word trillion comes from French tri- (Tri-.), French -illion

Detailed word origin of trillion

Dictionary entry	Language	Definition
tri-	French (fra)	Tri-.
-illion	French (fra)
trillion	French (fra)	1018; a long scale trillion; a short scale quintillion.
trillion	English (eng)	(US, modern, _, British, Australian, short scale) A million million: 1 followed by twelve zeros, 1012.. (dated, _, British, Australian, long scale) A million million million: 1 followed by eighteen zeros, 1018.

Words with the same origin as trillion