suspicax
From LSJ
ὕπνος δεινὸν ἀνθρώποις κακόν → sleep is a terrible evil for humans (Menander, Sententiae monostichoi 1.523)
Latin > English (Lewis & Short)
suspĭcax: ācis, adj. id.,
I apt to suspect, distrustful, suspicious.
I Lit. (very rare): populus suspicax ob eamque rem mobilis, Nep. Timoth. 3, 5: frater, Liv. 40, 14: animus alicujus, Tac. A. 1, 13.—
II Transf., that excites mistrust, suspicious: silentium, Tac. A. 3, 11 fin.; Sen. Ira, 2, 29, 2 (dub.; bracketed by Haase).