The story
- Ancient Greek · derived fromτριλογία“trilogy”
- Latin · learned borrowing fromtrilogia
- English todaytrilogy
PIE word *tréyes Learned borrowing from Latin trilogia, itself borrowed from Ancient Greek τριλογία (trilogía, “trilogy”). Morphologically from tri- + -logy.
Etymology from Wiktionary, CC BY-SA 4.0.