IPA: /ˌɪntəˈviːn/
KK: /ˌɪntərˈvin/
To come between or to get involved in a situation to help or change what is happening.
The teacher decided to intervene when the students started arguing.
Past: intervened
Past Participle: intervened
Intervene → It is formed from "inter-" (meaning between) and "venire" (meaning to come). The word describes the act of coming between to alter or stop a situation.
Think of someone 'coming between' ('inter-') to change or help a situation — that's what intervene means.