French word suffisamment comes from French -ment, French suffisant (Smug, vain, self-righteous. Sufficient; enough.)

Detailed word origin of suffisamment

Dictionary entry	Language	Definition
-ment	French (fra)	Used to form adverbs (from the feminine form of an adjective), most of the time equivalent to the English -wise, -ly. Used to form nouns from verbs, usually of action or state resulting of them. Equivalent to the English -ment.
suffisant	French (fra)	Smug, vain, self-righteous. Sufficient; enough.
suffisamment	French (fra)	Sufficiently; enough.

Words with the same origin as suffisamment