guarded
Definitions
Cautious and having possible reservations; not revealing one's true thoughts or feelings.
Protected, watched, or kept safe by a guard or barrier.
Examples
The prisoner remained under a heavily guarded escort throughout the journey.
She gave a guarded response when asked about the company's future plans.
The entrance to the secret facility was guarded by two armed sentries.
Synonyms
cautious wary reserved defensive circumspect discreet reticent