perturb, unhinge, disquiet, trouble, cark, distract, disorder (verb)

disturb in mind or make uneasy or cause to be worried or alarmed

"She was rather perturbed by the news that her father was seriously ill"

perturb (verb)

disturb or interfere with the usual path of an electron or atom

"The electrons were perturbed by the passing ion"

perturb (verb)

cause a celestial body to deviate from a theoretically regular orbital motion, especially as a result of interposed or extraordinary gravitational pull

"The orbits of these stars were perturbed by the passings of a comet"

perturb, derange, throw out of kilter (verb)

throw into great confusion or disorder

"Fundamental Islamicists threaten to perturb the social order in Algeria and Egypt"

perturb (Verb)

To disturb; to bother or unsettle.

perturb (Verb)

To slightly modify the motion of an object.

perturb (Verb)

To modify the motion of a body by exerting a gravitational force.

perturb (Verb)

To modify slightly, such as an equation or value.