Where does “battenen” come from?

battenen (Middle English) comes from Old Norse batna, from Proto-Germanic batnaną, from Proto-Germanic *bataz, from Proto-Indo-European bʰed- — to improve, make better.

Ancestry of “battenen”, step by step

StepLanguageWordMeaning
1Old Norsebatnato grow better, improve, recover
2Proto-Germanicbatnanąto get better
3Proto-Germanic*bataz—
4Proto-Indo-Europeanbʰed-to improve, make better
Every word from Proto-Indo-European bʰed- →Every word from Proto-Germanic *bataz →Every word from Proto-Germanic batnaną →