be on your guard; negligence is the enemy
treacherous; dangerous; untrustworthy; sneaky; cunning
one must constantly be on one's guard with ...; one cannot be too careful of ...
don't let your guard down; carelessness is the great enemy; danger comes soonest when it is despised
treacherous; dangerous; untrustworthy; sneaky; cunning
be on your guard; negligence is the enemy
alertly; vigilantly; warily; diligently; attentively
one must constantly be on one's guard with ...; one cannot be too careful of ...
to put someone off his guard; to throw someone off his guard