The story
- Latin · derived fromcallōsitās
- Anglo-Norman · derived fromcalosité
- Middle English · inherited fromcallosite
- English todaycallosity
From Middle English callosite, collositee, calosite, from Anglo-Norman calosité (compare Old French chalosité), from Latin callōsitās, equivalent to callous + -ity.
Etymology from Wiktionary, CC BY-SA 4.0.