Word Study
off guard
THESAURUS
off guard
asleep, culpably negligent, derelict, goofing off, inadvertent, inattentive, incautious, laissez-faire, lax, loose, napping, neglectful, neglecting, negligent, nodding, noninterfering, nonrestrictive, overly permissive, permissive, procrastinating, relaxed, remiss, scamping, skimping, slack, sleeping, slighting, slurring, unalert, uncautious, uncircumspect, unguarded, unprepared, unready, unrigorous, unvigilant, unwary, unwatchfulFor further exploring for "off guard" in Webster Dictionary Online