The story
- Ancient Greek · derived fromΣινωπίς“of Sinope”
- Latin · derived fromSinōpis
- Old French · derived fromsinople
- English todaysinople
From Old French sinople, from Latin Sinōpis, from Ancient Greek Σινωπίς (Sinōpís, “of Sinope”), a town that exported a red ocher. The unexpected change to meaning "green" in heraldry occurred in French texts around 1350 for unclear reasons.
Etymology from Wiktionary, CC BY-SA 4.0.