diagonal

The story

1. Ancient Greek · derived fromδιαγώνιος“from angle to angle”
2. Latin · derived fromdiagōnālis
3. Middle French · derived fromdiagonal
4. English todaydiagonal

From Middle French diagonal, from Latin diagōnālis, from Ancient Greek διαγώνιος (diagṓnios, “from angle to angle”), from διά (diá, “across”) + γωνία (gōnía, “angle”).