A primitive root; to hack (with words), i.e. Revile -- blaspheme, reproach.
Englishman's Concordance
1) to revile men, blaspheme God 1a) (Piel) 1a1) to revile (between men) 1a2) to blaspheme (God) Part of Speech: verb A Related Word by BDB/Strong’s Number: a primitive root Same Word by TWOT Number: 317
1revile, between man and man, (absolute) קוֺלמְחָרֵף וּמְגַדֵּףPsalm 44:17the voice of (him that) reproacheth and revileth.
2blaspheme, followed by accusative ׳יNumbers 15:30 (P); 2 Kings 19:22=Isaiah 37:23 ("" חֵרֵף; object אֶתמִֿי, reference to ׳י as above); Ezekiel 20:27; 2accusative הַדְּבָרִיםנַעֲרֵי מֶלֶךְ אַשּׁוּר אֹתִי׳אֲשֶׁר ג ... 2 Kings 19:6=Isaiah 37:6the words with which the servants of the king of Assyria blaspheme me.
Numbers 15:30 HEB:יְהוָ֖ה ה֣וּא מְגַדֵּ֑ף וְנִכְרְתָ֛ה הַנֶּ֥פֶשׁ NAS: that one is blaspheming the LORD; KJV: or a stranger, the same reproacheth the LORD; INT: the LORD one is blaspheming shall be cut person
2 Kings 19:6 HEB:שָׁמַ֗עְתָּ אֲשֶׁ֧ר גִּדְּפ֛וּ נַעֲרֵ֥י מֶֽלֶךְ־ NAS: of Assyria have blasphemed Me. KJV: of Assyria have blasphemed me. INT: you have heard which have blasphemed the servants of the king
2 Kings 19:22 HEB:מִ֤י חֵרַ֙פְתָּ֙ וְגִדַּ֔פְתָּ וְעַל־ מִ֖י NAS: have you reproached and blasphemed? And against KJV: Whom hast thou reproached and blasphemed? and against whom hast thou exalted INT: Whom reproached and blasphemed and whom
Psalm 44:16 HEB:מִ֭קּוֹל מְחָרֵ֣ף וּמְגַדֵּ֑ף מִפְּנֵ֥י א֝וֹיֵ֗ב NAS: of him who reproaches and reviles, Because KJV: of him that reproacheth and blasphemeth; by reason INT: of the voice reproaches and reviles of the presence of the enemy
Isaiah 37:6 HEB:שָׁמַ֔עְתָּ אֲשֶׁ֧ר גִּדְּפ֛וּ נַעֲרֵ֥י מֶלֶךְ־ NAS: of Assyria have blasphemed Me. KJV: of Assyria have blasphemed me. INT: you have heard which have blasphemed the servants of the king
Isaiah 37:23 HEB:מִ֤י חֵרַ֙פְתָּ֙ וְגִדַּ֔פְתָּ וְעַל־ מִ֖י NAS: have you reproached and blasphemed? And against KJV: Whom hast thou reproached and blasphemed? and against whom hast thou exalted INT: Whom reproached and blasphemed and whom
Ezekiel 20:27 HEB:ע֗וֹד זֹ֚את גִּדְּפ֤וּ אוֹתִי֙ אֲב֣וֹתֵיכֶ֔ם NAS: your fathers have blasphemed Me by acting treacherously KJV: Yet in this your fathers have blasphemed me, in that they have committed INT: Yet likewise have blasphemed your fathers A trespass
cut, cut off, II. deny a favour, be ungrateful, etc.; Aramaic Pa`el 
, revile) — Perfect2masculine singular