Where does “trafficator” come from?

trafficator (English) comes from English traffic, from Middle French trafique, from Italian traffico, from Vulgar Latin transfricare, from Latin fricō, from Latin frio, from Proto-Italic *friāō.

trafficator (English): A blinking light on a motor vehicle that indicates the direction in which it is about to turn

Definitions

A blinking light on a motor vehicle that indicates the direction in which it is about to turn

Ancestry of “trafficator”, step by step

Step	Language	Word	Meaning
1	English	traffic	Pedestrians or vehicles on roads, or the flux or...
2	Middle French	trafique	traffic
3	Italian	traffico	traffic; trade; activity, rush
4	Vulgar Latin	transfricare	to rub across
5	Latin	fricō	to rub
6	Latin	frio	I crumble, rub, or break into pieces
7	Proto-Italic	*friāō	—

Every word from Proto-Italic *friāō →