Where does “spellbinding” come from?

Spellbinding derives from English spell and English binding, where binding comes from Middle English -ing and Old English -ing, ultimately tracing to Proto-Indo-European bʰendʰ- meaning to bind or bend.

spellbinding (English): Engrossing; fascinating; gaining rapt attention;...

Definitions

  1. Engrossing; fascinating; gaining rapt attention;...

Ancestry of “spellbinding”, step by step

spellbinding traces back through two separate lines of ancestry.

via English spell

StepLanguageWordMeaning
1EnglishspellWords or a formula supposed to have magical...
2Old Frenchespelerto call; to cry out; to shout; to explain; to...
3Old Frenchespelir
4Frankishspelôn
5Proto-Germanicspellōnąto talk, tell, recount
6Proto-Germanicspelląnews, message; tale, story
7Proto-Indo-European(s)pel-to split in two, split in half; to speak with a...

via English binding

StepLanguageWordMeaning
1EnglishbindingImposing stipulations or requirements that must...
2Middle EnglishbyndyngeThe creation of a tie or binding
3Middle EnglishbindenTo secure or strengthen by various means; To take...
4Old Englishbindanto bind, constrain; to fasten or join
5Proto-West Germanicbindanto bind, to tie
6Proto-Germanicbindanąto bind, to tie
7Proto-Indo-Europeanbʰendʰ-to bind; bond

Words derived from “spellbinding

Every word from Proto-Indo-European (s)pel-
spellbinding — Etymology, Origin & Word History | Etymology Explorer