The present participle of 'english,' meaning to translate something into English or to make something English in character.
From the verb 'english' (to translate or adapt into English) plus the -ing participle suffix. The verb derives from the adjective 'English,' using the productive verb-forming pattern common since Middle English.
Before 'englishing' became an archaic term, it was how scholars and translators described their work—turning foreign texts into English. It's a reminder that 'English' itself can be used as a verb, just like 'french' (to trim meat) or 'welsh' (to fail to honor a bet).
Complete word intelligence in one call. Free tier — 50 lookups/day.