ἀφοβέω
From LSJ
ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
English (LSJ)
to be fearless, Sch.Opp.H.3.355.
Spanish (DGE)
ser intrépido, no tener miedo ἀτρομέοντες· ἀφοβοῦντες, ἄφοβοι ὄντες Sch.Opp.H.3.355.