Latin isthmus

← Ancient Greek ῐ̓σθμός (borrowed)

← Ancient Greek εἶμῐ (mention)

→ English isthmus (borrowed)

→ Catalan istme (borrowed)

→ German Isthmus (borrowed)

→ Spanish istmo (borrowed)

→ French isthme (learned borrowing)

→ Italian istmo (derived)

→ Portuguese istmo (derived)