IPA: /ˌɪntərˈmɛdələr/
KK: /ɪntərˈmɛdələr/
A person who interferes or gets involved in something that does not concern them.
The intermeddler caused confusion by trying to resolve a dispute that was not theirs to settle.
Intermeddler → It is formed from "inter-" (meaning between) and "meddle" (from Middle English *meddlen*, meaning to interfere or involve oneself). The word describes someone who interferes or involves themselves in the affairs of others, particularly in a way that is unwelcome.
Think of someone who gets 'involved' ('meddle') in things that are 'between' ('inter-') others — that's why an intermeddler is someone who interferes in others' matters.
No commonly confused words.