Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
trans-fŏro, āre, v. a., to pierce through: gladius idem et stringit et transforat, Sen. Ben. 2, 6, 1: baculus frangitur et transforat manum incubentis, Hier. in Matt. 1, 10, 9 sq.