The story
- Latin · derived from-ārium“-ary”
- Late Latin · derived frompassiō
- Medieval Latin · derived frompassiōnārium
- Middle English · inherited frompassyonarye
- English todaypassionary
From Middle English passyonarye, from Medieval Latin passiōnārium, from Late Latin passiō, passiōn- (“suffering, enduring; passion”) + Latin -ārium (“-ary”).
Etymology from Wiktionary, CC BY-SA 4.0.