Lexical Definition

‎καταμανθάνω‎ katamanthánō (kat-am-an-than'-o) to consider G:V
from ‎κατά‎ and ‎μανθάνω‎

consider.

Usage: 4 forms in 6 verses
Form Translated As     In Verse(s)
κατεμάνθανεν studied LXX.Gen.24.21LXX.Judg.5.28
καταμαθείν to study LXX.Gen.34.1LXX.Lev.14.36
καταμάθετε do observe Matt.6.28
κατάμαθε Study LXX.Job.35.5

Abbott-Smith

κατα-μανθάνω, [in LXX: Ge 34:1 (ראה), Jb 35:4(5) (שׁוּר), Si 9:5, 8, al.;]
to learn thoroughly, observe well, consider carefully (on distinction bet. κ. and μανθάνω, cf. M, Pr., 117): Mt 6:28.†

Abbott-Smith References

Book Refs
Genesis 34:1
Job 35:4 · 35:5
Matthew 6:28

Liddell-Scott-Jones

καταμανθάνω,

perfect -μεμάθηκα[Refs 5th c.BC+]:—observe well, examine closely, τὴν στρατιήν [Refs 5th c.BC+]; look to, inspect, τὸν ἐλαιῶνα [Refs 5th c.BC+]

__2 learn, acquire knowledge of, [Refs 5th c.BC+]; ὑπακούειν how to obey, variant in [Refs 5th c.BC+]
__3 perceive with the senses, observe, [Refs 4th c.BC+]: more commonly with the mind, understand, perceive, observe, οὐκ ὀρθῶς κ. [Refs 5th c.BC+]; κ. ὅτι.. Hp.[same place]; ῥᾴδιον τοῦτο κ., ὅτι.. [Refs 4th c.BC+]: perfect, to be aware, Λυκοῦργον -μεμάθηκας ὅτι.. [Refs 5th c.BC+]: with accusative et participle, κ. πολλοὺς ἔχοντάς τι [Refs 5th c.BC+]; καταμαθὼν δὲ.. καταστασιαζόμενος that a party was being formed against him, [Refs]
__4 consider, τι [Refs]