Lexical Definition

‎μωραίνω‎ mōraínō (mo-rah'-ee-no) be foolish G:V
from ‎μωρός‎

become fool, make foolish, lose savour.

Usage: 6 forms in 8 verses
Form Translated As     In Verse(s)
ἐμώρανεν has made foolish 1Cor.1.20
ἐμωράνθησαν they became fools Rom.1.22
μωρανθῇ shall become tasteless Matt.5.13 • Luke.14.34
μωρανθήσεται will be moronish LXX.Isa.19.11
μωραίνων being moronish LXX.Isa.44.25
εμωράνθη has acted moronish LXX.Jer.51.17
was made moronish LXX.Jer.10.14

Abbott-Smith

μωραίνω (< μωρός), [in LXX: Is 19:11, Je 10:14 28 (51):17 (בּער ni.), II Ki 24:10, Is 44:25 R (סכל ni., pi.)*;]
1. cl., to be foolish, play the fool.
2. LXX and NT, causal, to make foolish: I Co 1:20; pass., to become foolish: Ro 1:22; of salt that has lost its flavour, become tasteless: Mt 5:13, Lk 14:34.†

Abbott-Smith References

Book Refs
2 Samuel 24:10
Isaiah 19:11 · 44:25
Jeremiah 10:14 · 51:17
Matthew 5:13
Luke 14:34
Romans 1:22
1 Corinthians 1:20

Liddell-Scott-Jones

μωραίνω-αίνω,

future - ᾰνῶ [Refs 5th c.BC+]: aorist ἐμώρᾱνα [Refs 4th c.BC+] —passive, see below [Refs]: (μῶρος):—to be silly, foolish, drivel, [Refs 5th c.BC+]; play the fool, [Refs 4th c.BC+] make a mad attempt, [Refs 4th c.BC+]; οὐδεὶς.. ταῦτα μωραίνωαίνει indulges in these follies, [Refs 5th c.BC+]: euphemistic of illicit love, γυναῖκα μωραίνωαίνουσαν [Refs]

__II causal, make foolish, convict of folly, ἡ βουλὴ αὐτῶν μωραίνωανθήσεται [LXX]; ἐμωραίνωάνθην σφόδρα[LXX+NT]:—passive, to become foolish, be stupefied, [αἶγες] ἑστᾶσιν ὥσπερ μεμωραίνωαμμέναι [μωραίνωόομαι)">Refs 4th c.BC+]; to become insipid, ἐὰν τὸ ἅλας μωραίνωανθῇ [NT]

LSJ Scripture Refs: LXX.Isa.19.11 ☩ LXX.2Kgs.24.10 ☩ 1Cor.1.20 ☩ Matt.5.13