IPA: //ˌrɛvəˈleɪtəri//
KK: /ˈrɛvələtɔri/
Describing something that reveals or makes something known, often in a surprising or enlightening way.
The documentary provided a revelatory insight into the lives of the people in the community.
Revelatory → It is formed from "re-" (meaning again) and "velare" (meaning to unveil or reveal). The word "revelatory" means something that reveals or uncovers information again or anew.
Think of something that 'unveils' ('velare') information 'again' ('re-') — that's why revelatory means revealing something anew.