Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
vītex, ĭcis, f. [Sanscr. vaja, twig; Gr. ἴτυς, rim; cf. Curt. Gr. Etym. p. 392], the chaste-tree, Abraham’s balm: Vitex agnus castus, Linn.; Plin. 24, 9, 38, § 59.