Lexical Definition

‎ἀνδρίζομαι‎ andrízomai (an-drid'-zom-ahee) to act like a man ^G:V
middle voice from ‎ἀνήρ‎

quit like men.

• to act manly

Abbott-Smith

ἀνδρίζω, [in LXX for חזק, אמץ (Jos 1:6 ff., I Ch 22:19, al.; in II Ki 10:12, Ps 27:14 31:25 combined with κρατιοῦσθαι, as in I Co 16:13);]
to make a man of. Mid., to play the man (cf. MM, VGT, s.v.): I Co 16:13.†

Abbott-Smith References

Liddell-Scott-Jones

ἀνδρίζω,

make a man of, make manly, τοὺς γεωργοῦντας[Refs 5th c.BC+]

__II mostly in passive or middle, come to manhood, [Refs 5th c.BC+]
__II.2 play the man, [NT+5th c.BC+]; dress like a man, [Refs 2nd c.AD+]
__II.3 obscene meaning, [Refs 2nd c.AD+]; of a eunuch, ἀ. ἐπὶ γυναῖκα[Refs 2nd c.AD+]

_{LSJ Scripture Refs: LXX.Josh.1.6 ☩ 1Cor.16.13}