Part of speech: Verb
disturb in mind or make uneasy or cause to be worried or alarmed
Example: She was rather perturbed by the news that her father was seriously ill
Categories: Disturb, Upset, Trouble
Part of speech: Verb
disturb or interfere with the usual path of an electron or atom
Example: The electrons were perturbed by the passing ion
Categories: Deviate
Part of speech: Verb
cause a celestial body to deviate from a theoretically regular orbital motion, especially as a result of interposed or extraordinary gravitational pull
Example: The orbits of these stars were perturbed by the passings of a comet
Categories: Deviate
Part of speech: Verb
throw into great confusion or disorder
Example: Fundamental Islamicists threaten to perturb the social order in Algeria and Egypt
Categories: Disorder, Disarray
Unhinge, Throw out of kilter, Derange, Perturb, Trouble
The word "perturb" comes from Latin perturbo. It started in Old French perturber. Then it appeared in Middle English perturben.
Words that pass through many languages often accumulate layers of meaning from each culture.