Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
vēsānĭo (vaesā-), īre, 4, v. n. [vesanus], to be insane, rave (late Lat.): dicebat contra deum vesanire Theodosium, Cassiod. Hist. Eccl. 9, 30.
Hence, vēsānĭens, entis, part., raging, furious: vesaniente vento, Cat. 25, 13.