The story
- Proto-Indo-European*h₂ep
- Proto-Indo-European*h₂epó
- Proto-Hellenic*apó
- Ancient Greekᾰ̓πό (ăpó)
- Ancient Greekἀπο- (apo-)
- Proto-Indo-European*stel-
- Proto-Hellenic*stél͏̌l͏̌ō
- Ancient Greekστέλλω (stéllō)
- Ancient Greekἀποστέλλω (apostéllō)
- Ancient Greekἀπόστολος (apóstolos)
- Ancient Greekἀποστολικός (apostolikós)
- Latinapostolicu
- English todayapostolic
Learned borrowing from Latin apostolicus (“apostolic”), from Ancient Greek ἀποστολικός (apostolikós, “apostolic”).
Etymology from Wiktionary, CC BY-SA 4.0.