Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Brīsēïs, ĭdos (acc. Briseïda, Prop. 2, 8, 35; Ov. A. A. 3, 189 al.: Briseïdam, Hyg. Fab. 106; voc. Brisaeï, Ov. A. A. 2, 713), f., = Βρισηΐς, Hippodamia, daughter of Brises, and slave of Achilles, from whom she was taken by Agamemnon: Varro, Sat. Men. 63, 4; Prop. 2, 22, 29; Hor. C. 2, 4, 3; Ov. Am. 2, 8, 11; id. H. 3, 137.