disturbance

noun

1.
activity that is a malfunction, intrusion, or interruption
perturbation
2.
an unhappy and worried mental state
unsettling perturbation upset
Derived from:
disturb
3.
4.
5.
the act of disturbing something or someone; setting something in motion
Derived from:
disturb
6.
(psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness
folie mental disorder mental disturbance psychological disorder
7.
electrical or acoustic activity that can disturb communication
interference noise