Where does “euthyntérie” come from?

euthyntérie (French) comes from Ancient Greek εὐθυντηρία, from Ancient Greek εὐθῡντήρῐος, from Ancient Greek εὐθῡντήρ, from Ancient Greek εὐθῡ́νω, from Ancient Greek εὐθῠ́ς — straight, direct.

Ancestry of “euthyntérie”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	εὐθυντηρία	The part of a ship where the rudder was attached;...
2	Ancient Greek	εὐθῡντήρῐος	making straight, directing
3	Ancient Greek	εὐθῡντήρ	corrector
4	Ancient Greek	εὐθῡ́νω	I lead straight
5	Ancient Greek	εὐθῠ́ς	straight, direct

Every word from Ancient Greek εὐθῠ́ς →Every word from Ancient Greek εὐθῡ́νω →Every word from Ancient Greek εὐθῡντήρ →