Lexical Definition

‎προχειρίζομαι‎ procheirízomai (prokh-i-rid'-zom-ahee) to appoint G:V
middle voice from ‎πρό‎ and a derivative of ‎χείρ‎

choose, make.

Usage: 5 forms in 5 verses
Form Translated As     In Verse(s)
προχειρίσασθε handpick LXX.Josh.3.12
προχειρίσασθαί to appoint Acts.26.16
προχείρισαι to handpick LXX.Exod.4.13
προκεχειρισμένον appointed Acts.3.20
προεχειρίσατό has appointed Acts.22.14

Abbott-Smith

προ-χειρίζω (< πρόχειρος, at hand), [in LXX: Ex 4:13 (שׁלח), Jos 3:12 (לקח), Da LXX 3:22, II Mac 3:7 8:9 14:12 A*;]
1. to put into the hand, deliver up: pass., Ac 3:20.
2. More freq. as depon., -ομαι, to take into one's hand; hence, metaph., to propose, determine, choose: c. inf., Ac 22:14; c. acc. pers., Ac 26:16.†

Abbott-Smith References

Book Refs
Exodus 4:13
Joshua 3:12
Daniel 3:22
Acts 3:20 · 22:14 · 26:16

Liddell-Scott-Jones

προχειρίζω-ίζω,

make πρόχειρος, deliver up, -κεχειρικέναι τινὰ ἐπὶ τὸ (perhaps τῷ) τὴν τιμωρίαν δοῦναι [Refs 4th c.BC+]:—passive, mostly in participle, taken in hand, undertaken, τὸν προκεχειρις μένον λόγον [Refs 5th c.BC+]

__2 produce, ὡς ἴδια αὐτοὶ ἀφ᾽ ἑαυτῶν π. [Refs 4th c.AD+]
__II more frequently in middle προχειρίζωίζομαι, future -χειριοῦμαι[Refs 5th c.BC+]:—make ready for oneself, mobilize, προχειρίζωιοῦμαι κἀξετάσω τὴν οὐσίαν Ar.[same place]; δύναμιν, στρατόπεδα, [Refs 4th c.BC+]; τὰς ῥήσεις, τοὺς λογισμούς, [Refs 1st c.AD+]
__II.2 choose, select, δημαγωγούς [Refs 5th c.BC+]; γραμματέα κοινὸν ἐκ περιόδου [LXX+4th c.BC+]; appoint, τινὰ δικτάτορα [Refs 2nd c.AD+]:—passive, -ισθεὶς.. ἀγωνοθέτης [LXX+3rd c.BC+]; -ισθεὶς θεωρός [Refs 3rd c.BC+]; ὑπὸ τῶν πολιτῶν ἐπὶ τὴν στρατηγίαν [Refs 2nd c.BC+]
__II.2.b allot, assign, in passive, διὰ τὸ -κεχειρίσθαι αὐτῷ τὴν γῆν [Refs 3rd c.BC+]; τὰ Ποπλίῳ -κεχειρισμένα στρατόπεδα [NT+2nd c.BC+]
__II.3 prefer, οἱ Δημοσθένην -χειρισάμενοι [Refs 1st c.BC+]
__II.4 with infinitive, determine to do, [Refs 2nd c.BC+]: with accusative et infinitive, decide, τῆς πόλεως -κεχειρισμένης τὸν ἀγῶνα.. στεφανίτην εἶναι [Refs 3rd c.BC+]
__II.5 discuss or examine, τὰς ἄλλας κατηγορίας [Refs 4th c.BC+]; περὶ ἕκαστον γένος (variant{ἑκάστου γένους}) [Refs]
__II.6 ἐπὶ πραδείγματος π. propose by way of example, [Refs]:— passive, [Refs 1st c.BC+]

LSJ Scripture Refs: LXX.Josh.3.12LXX.Dan.3.22Acts.3.20