Where does “molser” come from?

molser (Old Occitan) comes from Vulgar Latin mulgere, from Latin mulgeō.

Ancestry of “molser”, step by step

Step	Language	Word	Meaning
1	Vulgar Latin	mulgere	present active infinitive of mulgeō;...
2	Latin	mulgeō	—

molser — Etymology, Origin & Word History | Etymology Explorer