The story
- Ancient Greek · derived fromᾰ̓λλήλων“one another, each other, mutually, reciprocally”
- English todayallelo-
From Ancient Greek ᾰ̓λλήλων (ăllḗlōn, “one another, each other, mutually, reciprocally”) + -o-.
Etymology from Wiktionary, CC BY-SA 4.0.