timidly — lacking in self-assurance, courage, or bravery; easily alarmed; timorous; shy.
fearfully — causing or apt to cause fear; frightening: a fearful apparition.
lightly — with little weight, force, intensity, etc.; gently: to press lightly on a door bell.
trivially — of very little importance or value; insignificant: Don't bother me with trivial matters.
carefully — cautious in one's actions: Be careful when you cross the street.
safely — secure from liability to harm, injury, danger, or risk: a safe place.
securely — free from or not exposed to danger or harm; safe.
cautiously — showing, using, or characterized by caution: a cautious man; To be cautious is often to show wisdom.
cowardly — If you describe someone as cowardly, you disapprove of them because they are easily frightened and avoid doing dangerous and difficult things.