ecumenism

The word 'ecumenism' is built upon the ancient Greek concept of the oikoumenē, which referred to the entire inhabited and known world. In early Christian usage, this term was adopted to signify the universal body of the Christian Church across the globe. The suffix '-ism' was later appended to form a noun denoting the principle or movement. Thus, the literal "doctrine of the inhabited world" evolved into the modern abstract meaning: a movement seeking to overcome historical divisions and foster unity within the worldwide Christian community, a sense sometimes extended to interfaith or broader social cooperation.

Structure: ecumen (inhabited world) + ism (doctrine or principle) - ecumen: From Greek oikoumenē (the inhabited world), via Latin oecumenicus. In this word, it functions as the root, carrying the core meaning of "the whole (Christian) world." - ism: A suffix of Greek origin (via Latin -ismus) used to form nouns indicating a distinctive doctrine, theory, system, or practice.