Quick Definition
μωραίνω v. I make foolish, taint, make useless
Strong's Definition
from 3474; to become insipid; figuratively, to make (passively, act) as a simpleton
KJV Usage: become fool, make foolish, lose savour
UBS Dictionary of the Greek New Testament
verb | aor. ἐμώρανα · aor.pass.subj. μωρανθῶ | μωρία · μωρολογία · μωρός
32.59 · Understand · Lack of Capacity for Understanding
to cause to become nonsense (causative derivative of μωρία ‘foolishness,’ 32.57) to cause the content of certain thoughts to become devoid of meaning In 1CO 1:20 the focus is upon the content of wisdom and nonsense, and it may be necessary to make this explicit, for example, ‘the people of the world thought that what they understood was wise, but God showed that their thoughts were foolish’ or ‘... their way of thinking was foolish.’
32.56 · (μωραίνομαι[a]) · Understand · Lack of Capacity for Understanding
to become foolish, to act more foolishly (derivative of μωρός[a] ‘unwise, foolish,’ 32.55) to become one who does not employ a capacity to understand and thus acts very foolishly
79.44 · (μωραίνομαι[b]) · Features of Objects · Sweet, Bitter, Tasteless
to become tasteless, to lose taste to become insipid or tasteless In MAT 5:13 μωραίνομαι is equivalent to ἄναλος (5.27), that is to say, to be without a salt taste. Pure salt cannot actually lose its taste, but the sodium chloride of impure salt can be leached out, especially in humid weather, and the remaining substance is accordingly tasteless. See also discussion at 5.25.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
μωραίνω: 1 aor. ἐμώρανα; 1 aor. pass. ἐμωράνθην; (μωρός); 1. in class. Grk. to be foolish, to act foolishly. 2. in bibl. Grk. a. to make foolish: pass. Ro. i. 22 (Is. xix. 11; Jer. x.14; 2S. xxiv. 10); i. 4. to prove a person or thing to be foolish: τὴν σοφίαν τοῦ κόσμου, 1 Co. i. 20 (τὴν βουλὴν αὐτῶν, Is. xliv. 25). b. to make flat and tasteless: pass. of salt that has lost its strength and flavor, Mt. v. 13; Lk. xiv. 34.
Mounce Concise Greek Dictionary
μωραίνω mōrainō 4x
to be foolish, to play the fool; in NT trans. to make foolish, convict of folly, 1 Cor. 1:20; pass. to be convicted of folly, to incur the character of folly, Rom. 1:22; to be rendered insipid, Mt. 5:13; Lk. 14:34*
Abbott-Smith Greek Lexicon
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.)*;]
cl., to be foolish, play the fool.
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.†
Liddell-Scott-Jones — Greek-English Lexicon
μωραίνω (mōrainō) — be foolish. μωρ-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 μωραίνει indulges in these follies, [Refs 5th c.BC+]: euphemistic of illicit love, γυναῖκα μωραίνουσαν [Refs]
II. causal, make foolish, convict of folly, ἡ βουλὴ αὐτῶν μωρανθήσεται [LXX]; ἐμωράνθην σφόδρα[LXX+NT]:—passive, to become foolish, be stupefied, [αἶγες] ἑστᾶσιν ὥσπερ μεμωραμμέναι [Refs 4th c.BC+]; to become insipid, ἐὰν τὸ ἅλας μωρανθῇ [NT]