unguarded (adjective) unguarded: thoughtless; unwary
Sinonime: accessible, artless,
candid,
careless,
casual,
direct, foolhardy,
frank, headlong,
heedless,
honest, ill-considered, impolitic,
imprudent,
impulsive, incautious, indiscreet,
ingenuous,
naive, offhand,
rash,
spontaneous,
straightforward, unalert, uncircumspect,
unconscious, undiplomatic, unpremeditated, unreflective, unthinking, unvigilant, unwatchful, unwise,
vulnerable,
weakAntonime: careful,
cautious,
thoughtful