in-sōpītus, a, um, adj.,
not lulled to sleep , sleepless , wakeful (poet.): draco, Ov. M. 7, 36; Luc. 9, 357: ignis, inextinguishable , Claud. Rapt. Pros. 3, 401.
īn-sōpītus adj., sleepless, wakeful: draco, O. ...
An Elementary Latin Dictionary