on-beornan

on-beornan, str.v: to set fire to, to kindle; to inflame. (on-BEH-or-nahn / ɔn-ˈbɛɔr-nan)

Medieval manuscript image of two people on either side of a waist-high pedestal on which a fire burns; they are looking at the small dragon that hovers above the fire.
Statius’ Thebaid and Achilleid; France (Paris), early 15th century; British Library, Burney MS 257, f. 169v. [bl.uk]