unwary
adjective
[ ʌnˈwɛːri ]
• not cautious of possible dangers or problems.
• "accidents can happen to the unwary traveller"
Similar:
incautious,
careless,
thoughtless,
unthinking,
heedless,
inattentive,
unwatchful,
unobservant,
off-guard,
off one's guard,
absent-minded,
napping,
dozy,
