apprehensive

adjective

1. 1

   in fear or dread of possible evil or harm

   apprehensive for one's life

   apprehensive of danger

2. 2

   mentally upset over possible misfortune or danger etc

   apprehensive about her job

   not used to a city and worried about small things

3. 3

   quick to understand

   a kind and apprehensive friend"- Nathaniel Hawthorne