The story
- Proto-Germanic · inherited from*unbalþaz“unbold”
- Old English · inherited fromunbeald“unbold, unconfident, irresolute”
- Middle English · inherited fromunbolde
- English todayunbold
From Middle English unbolde, unbald, from Old English unbeald (“unbold, unconfident, irresolute”), from Proto-Germanic *unbalþaz (“unbold”), equivalent to un- + bold. Cognate with Old High German unbald (“discouraged”).
Etymology from Wiktionary, CC BY-SA 4.0.