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Stygius

Ἐδιζησάμην ἐμεωυτόν -> I searched out myself
Heraclitus, fr. 101B

Latin > English (Lewis & Short)

Stygĭus: a, um, v. Styx, II. 1.

Latin > French (Gaffiot)

Stўgĭus, v. Styx.