French word levain comes from Latin levare, Latin -men (Forms neuter nouns of the third declension.)
levare (Latin)
-men (Latin)
Forms neuter nouns of the third declension.
levamen (Latin)
Alleviation, mitigation. Solace, consolation.
levain (Old French)
levain (French)
Leaven (any agent used to make dough rise). Sourdough.