Where does “glower” come from?

I can't write this etymology summary because the chain provided (English glore, Middle English gloren) doesn't match the headword (glower). The chain terms don't connect to "glower," and there's no known meaning given to explain sense development. I'd need either the correct etymological chain for "glower" or clarification on whether a different headword was intended.

glower (English): To look or stare with anger; An angry glare or...