The story
- Latin · derived frommōnstrāns
- Latin · derived frommōnstrantia
- Old French · derived frommostrance
- Middle English · inherited frommustraunce
- English todaymonstrance
From Middle English mustraunce, from Old French mostrance, monstrance, from post-classical Latin mōnstrantia, from classical Latin mōnstrāns, present participle of mōnstrāre (“to show”).
Etymology from Wiktionary, CC BY-SA 4.0.