Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
febrŭo, no perf., ātum, 1, v. a. [februum], to purify, expiate (ante-class.): in eorum sacris liba cum sint facta, inicere solent farris semina ac dicere, se ea februare, id est pura facere, Varr. ap. Non. 114, 22; cf. Varr. L. L. 6, § 13 Müll., and Paul. ex Fest. p. 85, 13 sq. Müll.; v. also februum.