French word sucer comes from Proto-Indo-European *suk-, and later Latin sugo (I exhaust. I suck. I take in.)

Detailed word origin of sucer

Dictionary entry	Language	Definition
*suk-	Proto-Indo-European (ine-pro)
sugo	Latin (lat)	I exhaust. I suck. I take in.
suctus	Latin (lat)
*suctiāre	Vulgar Latin (la-vul)
sucer	French (fra)	(slang, vulgar) to give head. To suck.

Words with the same origin as sucer