I let the secret about the surprise party spill out 'in an unguarded moment'.
an 'unguarded' remark
an 'unguarded' border
(..) shall be a-fume and the receipt of reason a limbeck only. When in swinish sleep their drenched natures lie as in a death what cannot you and I perform upon the unguarded Duncan? What not put upon his spongy officers who shall bear the guilt of our great quell? I am settled (..)2015 Macbeth