You searched for: “superstitious
superstitious (adjective); more superstitious, most superstitious
1. Referring to individuals who believe in things which are not true or factual: The fear Jane felt creeping up her back originated from the superstitious opinion of her parents that black cats crossing from the left to the right would bring bad luck!

People are likely to fear what is unknown, such as the man who said he wasn't superstitious because he was afraid it might bring him bad luck!
2. Pertaining to or connected with unfounded beliefs: Ivy loved reading superstitious legends because they took her into a fantasy world full of myths and old wives' tales.