Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† cryptŏportĭcus, ūs, f. [vox hibrida, from κρυπτός and porticus], a covered gallery or passage, a vault, a hall, Plin. Ep. 2, 17, 16 sq.; 5, 6, 27 sq. al.