Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
2. unctus, ūs, m. [ungo], an anointing, anointment: oleum unctui profer, App. M. 1, p. 113, 3: cochlearum cinis cum melle unctu sanat, Plin. 30, 10, 27, § 90 (al. linitu).