IPA: /ʌnˈɡɑːrdɪd/
KK: /ʌnˈɡɑrdɪd/
Not being careful or cautious; open to danger or criticism.
She made an unguarded comment that surprised everyone.
Unguarded → It is formed from "un-" (meaning not) and "guarded" (from Old French *guarder*, meaning to keep safe or protect). The word "unguarded" means not protected or lacking a guard.
Think of being 'not protected' ('un-') and 'kept safe' ('guarded') — that's why unguarded means without protection.