IPA: /ˌɪntəˈfɪərə/
KK: /ˈɪntərˌfɪrər/
A person or thing that gets involved in a situation, often causing disruption or problems.
The interferer caused delays in the project by constantly changing the plans.
Interferer → It is formed from "inter-" (meaning between) and "ferre" (meaning to carry or bring). The word "interferer" describes someone who brings themselves into a situation between others, often causing disruption.
Think of someone who 'carries' themselves 'between' others — that's why an interferer is someone who disrupts or meddles in a situation.