Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
būcĭno (bucc-), āvi, ātum, 1, v. n. [bucina], to blow the bucina, to sound or give a signal with the trumpet (mostly impers.; cf. Gr. σαλπίζειν): cum bucinatum est, Varr. R. R. 2, 4, 20: saepe declamante illo ter bucinavit, Sen. Contr. 3 praef.: bucinate in neomeniā tubā, Vulg. Psa. 81 (80), 4: Triton conchā sonaci leniter bucinat, App. M. 4, p. 157, 3; cf. bucina, II. C.