cau·tious
 /ˈkɑːʃəs/  adj   [more ~; most ~]
  : careful about avoiding danger or risk
   Any cautious tourist will guard her passport.
   You cannot be overly/too cautious when you're driving in snow.
   He answered the question with a cautious reply.
  cau·tious·ly  adv   [more ~; most ~]
   She cautiously moved down the dark hall.
  cau·tious·ness  noun   [  noncount  ]
   They proceeded with cautiousness. [=caution]