IPA: /ˈtraɪəˌlɔːɡ/
KK: /ˈtraɪəˌlɔg/
A discussion or conversation that involves three people or groups talking to each other.
The trialogue between the three leaders helped to resolve the conflict.
Trialogue → It is formed from 'tri-' (meaning three) and 'logus' (from Greek 'logos', meaning word or discourse). The word 'trialogue' refers to a discourse or conversation involving three parties.
Think of 'three' ('tri-') people having a 'conversation' ('logus') together — that's what a trialogue means.