Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
tarmĕs, ĭtis, m. [root tero; Gr. τείρω, to bore], a worm that eats wood, a woodworm, Plaut. Most. 3, 2, 140.
Written also termes, Isid. Orig. 12, 5, 10; Serv. Verg. G. 1, 256.