Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
angĭportus, ūs, m. (and angĭpor-tum, i, n.; cf. Prisc. p. 714 P.) [ang- as in angustus, and portus; cf. Varr. L. L. 5, § 145 Müll.; Paul. ex Fest. p. 17 Müll.], a narrow street, lane, or alley, Paul. ex Fest. l. l.; cf. Dig. 16, 59; Plaut. Cist. 1, 2, 5; id. Most. 5, 1, 5: viae omnes angiportusque, Cic. Div. 1, 32, 69; * Hor. C. 1, 25, 10; Plaut. Ps. 4, 2, 5; 4, 7, 137; id. Cist. Fragm. ap. Non. p. 190, 10; Ter. Ad. 4, 2, 39; id. Eun. 5, 2, 6: angiporto toto deerrare, Auct. ad Her. 4, 51, 64: in quadriviis et angiportis, Cat. 58, 4.