IPA: /ˌɛkjuˈmɛnɪkli/
KK: /ˌɛkjuˈmɛnɪkli/
In a way that promotes unity and cooperation among different Christian denominations or religious groups.
The leaders met ecumenically to discuss ways to foster better relationships between their communities.
Ecumenically → It is formed from "oikoumene" (Greek, meaning the inhabited world) and the suffix "-ical" (meaning pertaining to). The word "ecumenically" refers to matters that pertain to the whole inhabited world, especially in a religious context.
Think of the Greek word for the 'inhabited world' — that's what ecumenically relates to, meaning it pertains to the whole world, especially in terms of unity among different Christian denominations.