The story
- Proto-West Germanic · derived from*bi-
- Proto-West Germanic · inherited from*bihindan
- Old English · inherited frombehindan“on the back side of, behind”
- Middle English · inherited frombehinde
- English todaybehind
From Middle English behinde, behinden, from Old English behindan (“on the back side of, behind”), from Proto-West Germanic *bihindan, *bihindini (“on the back side of, in the rear of, behind”), from Proto-West Germanic *bi- + *hindō (“the hind side, back part”), equivalent to be- + hind. Compare Old Saxon bihindan (“behind”, adverb), Middle High German behinter (“behind; back”).
Etymology from Wiktionary, CC BY-SA 4.0.