perturbative

[ pur-ter-bey-tiv, per-tur-buh-tiv ]
/ ˈpɜr tərˌbeɪ tɪv, pərˈtɜr bə tɪv /

adjective

having a tendency to perturb; disturbing.

Origin of perturbative

From the Late Latin word perturbātīvus, dating back to 1630–40. See perturbation, -ive