vinnewed
Mouldy; (by extension) having some other unwanted or spoiling growth like mould.
archaic, rare
Vinnewed Ore [is] Copper Ore that has a blue or green spume, or efflorescence upon it like verdigris.
Where it comes from
From Middle English yvyned (past participle of vynyen, *vinewen, *fenowen (“to be mouldy”)), from Old English ġefinegod, *ġefynegod, past participle of Old English fynegian (“to become mouldy”), from fyniġ (“mouldy, musty”), equivalent to finew + -ed. Doublet of fenowed. Related to Old English fyne (“moisture, mold, mildew”). More at finew.
Adapted from the Wiktionary entry vinnewed (CC BY-SA 4.0).