ε
From LSJ
συνετῶν μὲν ἀνδρῶν, πρὶν γενέσθαι τὰ δυσχερῆ, προνοῆσαι ὅπως μὴ γένηται· ἀνδρείων δέ, γενόμενα εὖ θέσθαι → it is the part of prudent men, before difficulties arise, to provide against their arising; and of courageous men to deal with them when they have arisen
English (LSJ)
ἒ ψιλόν, fifth letter of the Gr. alphabet: as numeral έ
A = πέντε and πέμπτος, but ε' = 5,000:—its name was εἶ, q.v., later ἒ ψιλόν; cf. ψιλός.