Apprehensive
Part of speech: adjective
Definition: Anticipating something with anxiety or fear. Perceptive; quick to learn; intelligent; capable of grasping with the mind or intellect.
Example sentence: You always get apprehensive before you do shoots.
Afraid
Part of speech: adjective
Definition: Impressed with fear or apprehension; in fear.regretful, sorry
Example sentence: Don't be afraid to give up the good to go for the great.