An Etymological Dictionary of Astronomy and Astrophysics

1. To interfere with; interrupt; hinder.
   

2. To interfere with the arrangement, order, or harmony of; disarrange (Dictionary.com).

Etymology (EN): M.E., from O.Fr. destorber, from L. disturbare “to throw into disorder,” from → dis- “completely” + turbare “to disorder, disturb,” from turba “turmoil,” → turbid.

Etymology (PE): Parišândan, infinitive from parišân “dispersed, scattered,” also parišidan “to disperse, get disturbed,” ultimately from Proto-Ir. *parišan- literally “disperse around,” from *pari-, Pers. par-, pirâ-, → peri-, + *šan- “to shake;” cf. afšândan, → volcano; Choresmian šny- “to tremble;” Zazaki šânâyiš/šânen- “to shake, scatter;” Kurd râšândin “to spread;” Tabari šanne “he shakes” (Cheung 2007).