Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Ămăryllis, ĭdis or ĭdos, f. (acc. Amaryllida; voc. Amarylli), = Ἀμαρυλλίς, name of a shepherdess, Verg. E. 1, 31; 1, 37 al.