afraid — If you are afraid of someone or afraid to do something, you are frightened because you think that something very unpleasant is going to happen to you.
cautious — Someone who is cautious acts very carefully in order to avoid possible danger.
cowardly — If you describe someone as cowardly, you disapprove of them because they are easily frightened and avoid doing dangerous and difficult things.
delicate — Something that is delicate is small and beautifully shaped.
fearful — causing or apt to cause fear; frightening: a fearful apparition.