The story
- Proto-Indo-European*h₁én
- Proto-Indo-European*h₁énteros
- Latin*interus
- Latinintrā
- Latinintrō
- Old Frenchentrer
- Middle Frenchentrer
- Frenchentrer
- Frenchentrisme
- Englishentrism
- Englishentryinflu.
- English todayentryism
Previously spelt entrism, borrowed from French entrisme but reconstructed as entry + -ism.
Etymology from Wiktionary, CC BY-SA 4.0.