The story
- Proto-Germanic*bagmaz?
- Proto-West Germanic*baum
- Old Englishbēam
- Middle Englishbem
- Englishbeam
- Proto-Indo-European*(s)kelH-
- Proto-Indo-European*(s)kel(H)-p-
- Proto-Germanic*skelfō
- Proto-West Germanic*skelfu:
- Proto-West Germanic*skilfijā
- Old Englishsċylfe?
- Middle Englishschelfe
- Englishshelf
- English todaybeamshelf
Etymology from Wiktionary, CC BY-SA 4.0.