The story
- Old English · inherited frombrȳdlāc“bridal, wedded condition, marriage ceremony”
- Middle English · inherited frombrudlak
- English todaybridelock
From Middle English brudlak, brudlac (“nuptuals”), from Old English brȳdlāc (“bridal, wedded condition, marriage ceremony”). By surface analysis, bride + -lock.
Etymology from Wiktionary, CC BY-SA 4.0.