Disturbance

To confuse a quiet, constant state or a calm, continuous flow, in particular: thoughts, actions or liquids.

“A school of fish disturbed the water.”

To divert, redirect, or alter by disturbing.

“A mudslide disturbed the course of the river.”

To have a negative emotional impact; to cause emotional distress or confusion.

“A disturbing film that tries to explore the mind of a serial killer.”