ἠρεμίζω
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 bring to rest, stop, ἵππον X.Eq.7.18; ὁρμήν Arist.EE1224b8:—Pass., Id.APo.87b9, Ph.238b25, al.; καθίσταται καὶ -ίζεται is calmed and brought to rest, ib.248a2. II intr.,= ἠρεμέω, X.Lac.1.3.