The story
- Proto-West Germanic · inherited from*biþakkjan
- Old English · inherited frombeþeċċan“to cover; protect; cover over; conceal”
- Middle English · inherited frombithecchen
- English todaybethatch
From Middle English bithecchen, from Old English beþeċċan (“to cover; protect; cover over; conceal”), from Proto-West Germanic *biþakkjan, equivalent to be- + thatch. Cognate with Dutch bedekken (“to cover”), German bedecken (“to cover”). More at its doublet bedeck. Alteration in vowel after Middle English perhaps due to thatch.
Etymology from Wiktionary, CC BY-SA 4.0.