The story
- Proto-Indo-European*upó
- Proto-Germanic*ub
- Proto-Germanic*upp
- Proto-West Germanic*upp
- Old Englishup
- Old Englishup-
- Proto-Germanic*bregdaną
- Proto-West Germanic*bregdan
- Old Englishbreġdan
- Old Englishupbreġdan
- Middle Englishupbreiden
- English todayupbraid
From Middle English upbreiden, from Old English upbreġdan, equivalent to up- + braid. Compare English umbraid (“to upbraid”), Icelandic bregða (“to draw, brandish, braid, deviate from, change, break off, upbraid”). See up, and braid (transitive).
Etymology from Wiktionary, CC BY-SA 4.0.