insollicitus

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

in-sollĭcĭtus, a, um, adj.,

unconcerned , careless : insollicitus dies, ἀμνήμονος ἡμέρα (dub.; perh. ἀμέριμνος), Gloss. Philox.