Filled with fear or terror
Mr. Cooms was apprehensive about what he described as an assault on our safety.
He's certainly apprehensive about something.
His expression was apprehensive, but he said nothing.
While Cynthia was apprehensive over the wildness of the area, once there, the stark beauty that engulfed her dispelled her earlier trepidation.
Even Katie looked apprehensive at her hesitation.