σοί
From LSJ
ὅταν δὲ τἄμ' ἀθυμήσαντ' ἴδῃς, σύ μου τὸ δεινὸν καὶ διαφθαρὲν φρενῶν ἴσχναινε παραμυθοῦ θ' → whenever you see me despondent over my situation, do what you can to lessen and relieve what is wild and senseless in my thinking | whenever you see me despondent, you must cure the grim derangement of my mind and encourage me
English (LSJ)
A v. σύ. σοιδηύδεις· βάκχαι . ., Hsch. σοίθης· ψίθυρος, ἀλαζών, διάβολος, Id. σοίκιδες· κώνωπες, Id. σοῖο, Ion.gen. of σός, σόν.
Greek (Liddell-Scott)
σοί: ἴδε σύ.