Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† baptīzo, āvi, ātum, 1, v. a., = βαπτίξω, only in eccl. Lat., to baptize, Vulg. Judith, 12, 7; id. Matt. 3, 6; id. Marc. 1, 8; and Tert. Aug. Hier. al. saep.