hearm-tān, m.n: a “twig of sorrow” or “branch of strife/evil”. (“heh-arm-tahn”)
If you’re wondering when in the world you’d use such a word, check out my post on blood and trees. Scroll down to the quotation from the Old English poem Genesis A.

Cain striking Abel in the “Taymouth Hours” (British Library, MS Yates-Thompson 13, fol. 28r).