theriac

The story

1. Ancient Greek · derived fromθηριακὴ“of or related to poisonous reptiles”
2. Late Latin · derived fromtheriaca
3. Ancient Greek · derived fromθηριακὸν
4. Medieval Latin · borrowed fromtheriacum
5. English todaytheriac

From Medieval Latin theriacum, from Ancient Greek θηριακὸν (thēriakòn) and Late Latin theriaca, from Ancient Greek θηριακὴ (thēriakḕ, “of or related to poisonous reptiles”), from θηρίον (thēríon, “little beast”) + -κός (-kós), from θήρ (thḗr, “beast”) + -ίον (-íon, diminutive suffix). Doublet of theriaca.