Lexical Definition

‎ἄπειρος‎ ápeiros (ap'-i-ros) unacquainted G:A
from ‎Α‎ (as a negative particle) and ‎πεῖρα‎

unskilful.

Usage: 4 forms in 5 verses
Form Translated As     In Verse(s)
ἄπειροσ inexperienced Heb.5.13
απείρω a vast LXX.Jer.2.6
απείρου an inexperienced LXX.Zech.11.15
άπειροσ he was inexperienced LXX.1Sam.17.39
inexperienced LXX.Num.14.23

Abbott-Smith

ἄπειρος, -ον (< ἀ- neg., πεῖρα, trial), [in LXX: Nu 14:23, Za 11:15 (אֱוִילִי), Je 2:6 (עֲרָבָה)*;]
without experience of: c. gen. rei, He 5:13 (MM, VGT, s.v.).†

Abbott-Smith References

Book Refs
Numbers 14:23
Jeremiah 2:6
Zechariah 11:15
Hebrews 5:13

Liddell-Scott-Jones

ἄπειρος, ον,

(πεῖραρ, πέρας)

__B boundless, infinite, σκότος[Refs 5th c.BC+]; of number, countless, πλῆθος[Refs 5th c.BC+]: comparative -ότερος[Refs 5th c.AD+]; τὸ . the Infinite, as a first principle, [Refs 4th c.BC+]; especially in the system of Anaximander, [Refs 3rd c.AD+]; but τὰ ἄπειρα individuals, opposed to τὰ εἴδη, [Refs 4th c.BC+]; ἄπειρος, opposed to πεπερασμένος, [Refs]; εἰς . ἰέναι, προϊέναι, ἥκειν, etc., [Refs 1st c.BC+]; also, indefinite, ὕλη[Refs]
__B.2 in Trag., frequently of garments, etc., in which one is entangled past escape, i.e. without outlet, ἀμφίβληστρον[Refs 5th c.BC+]
__B.3 endless, i.e. circular, . δακτύλιος a simple hoop-ring, ={ἄλιθος} [Refs 4th c.BC+]adverb -ρως, θρυφθῆναι into an infinite number of fragments, [Refs]