Merriam-Webster's Advanced Learner's Dictionary:
repetitive
re·pet·i·tive /rɪˈpɛtətɪv/ adj
1 : happening again and again : repeated many times
• an injury caused by repetitive wrist movements
• a repetitive pattern
• repetitive stress/strain
2 : having parts, actions, etc., that are repeated many times in a way that is boring or unpleasant : repetitious
• She left the job because the work was too repetitive.
• At the risk of being/sounding repetitive, I must remind you again to be careful.
- re·pet·i·tive·ly adv
• an injury caused by repetitively flexing the wrist
- re·pet·i·tive·ness noun [noncount]