batten

Origin

The verb is derived from Middle English *battenen, *batnen, of North Germanic origin, probably from Old Norse batna (“to grow better, improve, recover”), from Proto-Germanic *batnaną (“to become better, improve”) (compare Old Norse bati (“advantage, improvement”), from Proto-Germanic *batô (“improvement, recovery”)), from *bataz (“good”), from Proto-Indo-European *bʰed- (“good”). Compare battle (“(adjective) improving; fattening, nutritious; fertile, fruitful; (verb) to feed or nourish; to render (land, etc.) fertile or fruitful”) (obsolete). The adjective is probably derived from the verb.