“εάνπερ” is an ancient Greek word and it is not used in modern Greek.
It is a combined word, εάν + περ.
Εάν means “if maybe” in ancient Greek.
Περ intensifies the meaning (of εάν).
This is how it is pronounced:
https://learn-greek-online.com/mp3/eanper.mp3
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Vasiliki Baskou, Instructor/Director, https://learn-greek-online.com.