Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† empŏrus, i, m., = ἔμπορος, a trader, merchant, Aus. Epist. 22, 28.
Emporos, title of a play of Philemon (the Mercator of Plautus), Plaut. Merc. 1, 1, 5.