IPA: /dɪsˈrʌptər/
KK: /dɪsˈrʌptər/
A person or thing that causes a disturbance or interruption in a process or system.
The new technology acted as a disrupter in the traditional market.
Disrupter → It is formed from "dis-" (meaning apart) and "rumpere" (meaning to break). The word describes someone who breaks apart the usual way of doing things, causing disruption.
Think of someone who 'breaks apart' ('dis-') the normal flow of events — that's why a disrupter is someone who causes disruption.