incautus

Etymology
From.

Adjective

 * 1) incautious, heedless, reckless, unsuspecting, improvident, in one’s ignorance, not careful, careless
 * 2)  unforeseen, unexpected, unguarded against, off one’s guard
 * 1)  unforeseen, unexpected, unguarded against, off one’s guard
 * 1)  unforeseen, unexpected, unguarded against, off one’s guard