Meaning: displaying or feeling no wariness; "an unguarded remark"
Meaning: lacking protection or a guard; "an unguarded gate"; "his unguarded queen was open to attack"
He must never be left an instant unguarded.
"The recompense of a sweet smile, a tender blush and the unguarded thanks of a pretty woman.
As we went I prayed that all the Quabos had centered their attention on the palace and left their vulnerable water-hoses unguarded.
Catching her royal mistress in an unguarded moment, this lady succeeded in inducing the Queen to promise the bishopric of Poitiers to her son, a young man of very bad character.
With many compliments to them, and much self-gratulation on the prospect of a connection between the houses, he unfolded the matter--to an audience not merely wondering, but incredulous; for Mrs. Bennet, with more perseverance than politeness, protested he must be entirely mistaken; and Lydia, always unguarded and often uncivil, boisterously exclaimed: