gnaw

From Middle English gnawen, gnaȝen, from Old English gnagan, from Proto-West Germanic gnagan, from Proto-Germanic gnaganą (“to gnaw”), probably from Proto-Indo-European *gʰnēgʰ- (“to gnaw, scratch”). Cognate with Dutch knagen, German nagen, Danish gnave (“to gnaw”), Norwegian Bokmål gnage, Norwegian Nynorsk gnaga, Swedish gnaga.