IPA: /ˈɪntəˌtʃɜːtʃ/
KK: /ˈɪntərˌtʃɜːrʧ/
Relating to or involving different churches or religious groups.
The interchurch meeting aimed to promote unity among various denominations.
Interchurch → It is formed from "inter-" (meaning between) and "church" (from Old English "cirice", meaning a place of worship). The word "interchurch" refers to activities or relations that occur between different churches.
Think of 'between' ('inter-') different 'places of worship' ('church') — that's what interchurch means.