Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
‡ in-sollĭcĭtus, a, um, adj., unconcerned, careless: insollicitus dies, ἀμνήμονος ἡμέρα (dub.; perh. ἀμέριμνος), Gloss. Philox.