Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sēmĭ-plēnus, a, um, adj., half-full (class.): naves, Cic. Verr. 2, 5, 25, § 63: scrobes, Col. 5, 5, 4: favi, id. 9, 15, 4: vas, Pall. Febr. 32: stationes, only half-filled, half-manned, Liv. 25, 30 fin.; cf. legiones, Vell. 2, 80, 1; 2, 112, 2.
* Adv.: sēmĭ-plēnē, half in full, incompletely, in part: dicuntur praesentia, Sid. Ep. 4, 22 med.