Lewis Short
(adjective) : in-compertus, a, um
* Of which one has no information, unknown (not anteAug.): inter cetera vetustate incomperta hoc quoque in incerto positum,Liv. 4, 23, 3: ne quid incompertum deferret,id. 10, 40, 10; 9, 26, 15: origo atque natura ejus incomperta est mihi,Plin. 34, 13, 38, § 137: qualis sit ea incompertum habeo,I do not know,id. 12, 8, 16, § 32.
Charlton T. Lewis, Charles Short, A Latin Dictionary