French word grammaticalement comes from French -ment, French grammatical (Grammatical.)

Detailed word origin of grammaticalement

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.
grammatical	French (fra)	Grammatical.
grammaticalement	French (fra)	Grammatically.

Words with the same origin as grammaticalement