Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sămĭo, āvi, ātum, 1, v. a. [Samius], to polish or furbish with Samian stone (late Lat.): loricas, cataphractas, Veg. Mil. 2, 14: ferramenta, Aur. ap. Vop. Aur. 7.