IPA: /pɑːrˈtɪsɪpətəri/
KK: /pɑrˈtɪsəˌpeɪtəri/
Relating to or allowing people to take part in something, especially in decision-making or activities.
The community organized a participatory event to gather input from residents.
Participatory → It is formed from "participare" (from Latin, meaning to take part) and the suffix "-ory" (meaning relating to or characterized by). The word "participatory" describes something that is characterized by or relating to taking part or being involved.
Think of 'taking part' ('participare') in something — that's why participatory means relating to being involved.