Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ex-ungo, no perf., unctum, 3, v. a., to anoint (a Plautinian word): eluas tu an exungare, ciccum non interduim, Plaut. Rud. 2, 7, 22: exunctum, elutum in balineis, spent on ointments, id. Trin. 2, 4, 5.