1. To murder someone, typically a target, as a covert operation.

2. A dark area created by the absence of light, used by ninjas for concealment.

3. The use of disguises or blending into the surroundings to remain unseen.

4. Moving up or down a wall, tree, or other vertical surfaces using hands and feet.

5. To secretly enter or gain access to a place without permission.

6. The act of focusing one's mind to achieve mental clarity and inner calmness.

7. The time of day when darkness begins, providing better cover for ninjas.

8. A training facility or school where ninjas practice martial arts.

9. The practice of obtaining secret information without the permission of the owner.

10. The ability to move silently and secretly, avoiding detection.

11. The physical fight or battle between ninjas or with enemies.

12. A face-covering worn by ninjas to conceal their identity.

13. A small, star-shaped throwing weapon used by ninjas.

14. Warriors of feudal Japan, often in conflict with ninjas.

15. To take something without permission or right, often done covertly by ninjas.

15. A three-pronged weapon used by ninjas for blocking, striking, and trapping.

16. The ability to move quickly and easily with great coordination and flexibility.

17. A school or style of martial arts training, followed by ninjas.