'self-disturbance' originates from the combination of 'self,' meaning one's own person, and 'disturbance,' meaning disruption or disorder.

The term 'disturbance' evolved from the Old French word 'destourber,' which meant to trouble or disturb, and was combined with 'self' to form the modern term 'self-disturbance.'

Initially, 'disturbance' referred to any form of disruption, but in the context of 'self-disturbance,' it specifically refers to disruptions in one's sense of self.