The story
- Old English · inherited fromwedlāc“marriage vow, pledge, plighted troth, wedlock”
- Middle English · inherited fromwedlok
- English todaywedlock
From Middle English wedlok, wedlocke (“wedlock, marriage, matrimony”), from Old English wedlāc (“marriage vow, pledge, plighted troth, wedlock”). By surface analysis, wed + -lock.
Etymology from Wiktionary, CC BY-SA 4.0.