Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
prōditrix, īcis, f. [proditor], a female betrayer, a traitress (post-class.): patris, Lact. 1, 10, 9: proditrices numinum, Serv. Verg. E. 8, 30.
Trop.: Fama proditrix, Prud. στεφ. 1, 11.