Use 'be on your guard' in situations where caution is advised due to possible risks or threats.

Context Matters

'Be on your guard' signals that one must pay extra attention to avoid harm or deceit.

Risk Warning

Pair 'be on your guard' with words like 'against', 'for', or 'with' to specify the threat.

Implies readiness to respond or defend oneself from a person or situation posing a threat.

Suggests carefulness in trusting people who haven't proven their dependability yet.

Can subtly imply that something isn't quite right without making direct accusations.