The story
- Late Latin · derived fromrēgulāritās, rēgulāritātem
- Old French · derived fromregularite
- Middle French · borrowed fromregularite
- English todayregularity
Borrowed from Middle French regularite, from Old French regularite, from Late Latin rēgulāritās, rēgulāritātem, from rēgulāris; see regular. By surface analysis, regular + -ity.
Etymology from Wiktionary, CC BY-SA 4.0.