megachurch

The story

1. Proto-Indo-European*méǵh₂s
2. Proto-Hellenic*mégas
3. Ancient Greekμέγᾰς (mégăs)
4. Englishmega-
5. Proto-Indo-European*ḱewh₁-
6. Proto-Indo-European*ḱuh₁ryós
7. Proto-Hellenic*kúrios
8. Ancient Greekκῡ́ριος (kū́rios)
9. Koine Greekκῡριακός (kūriakós)
10. Koine Greekκῡρῐᾰκόν (kūrĭăkón)
11. Proto-West Germanic*kirikā
12. Old Englishċiriċe
13. Middle Englishchirche
14. Englishchurch
15. English todaymegachurch

From mega- + church.