dis·turb 
(dĭ-stûrb)
(dĭ-stûrb)tr.v. dis·turbed, dis·turb·ing, dis·turbs
1. To break up or destroy the tranquility, order, or settled state of: "Subterranean fires and deep unrest disturb the whole area" (Rachel Carson).
2. To trouble emotionally or mentally; upset: It disturbed me when you left without saying goodbye.
3.
a. To interfere with; interrupt: noise that disturbed my sleep.
b. To intrude on; inconvenience: Constant calls disturbed her work.
4. Physics To alter or displace a region of (a medium) from its equilibrium state.
[Middle English distourben, from Old French destourber, from Latin disturbāre : Latin dis-, dis- + Latin turbāre, to agitate (from turba, confusion, probably from Greek turbē).]
dis·turber n.
dis·turbing·ly adv.