Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pro-vulgo (-volgo), āvi, ātum, 1, v. a., to make publicly known, to publish, divulge (post-Aug.): conjurationibus provulgatis, Suet. Ner. 36: operam, Sid. Ep. 9, 11: eas litteras, App. Mag. 84, p. 327, 20: facti miraculum, Sulp. Sev. Chron. 2, 5, 4; Tert. adv. Marc. 4, 21.