The story
- Old Norse · borrowed fromgaldr
- Proto-Germanic · derived from*galdraz“song, incantation, spell”
- Proto-West Germanic · derived from*galdr
- Old English · derived fromgaldor
- Middle English · learned borrowing fromgalder
- English todaygalder
Learned borrowing from Middle English galder, from Old English galdor, from Proto-West Germanic *galdr, from Proto-Germanic *galdraz (“song, incantation, spell”), through garnered interest via Old Norse galdr, equivelant to gale + -der, or yell + -der, deriving from a sense of "magical chanting".
Words from the same roots
Etymology from Wiktionary, CC BY-SA 4.0.