certainly, divine, enchanter, use enchantment, learn by experience, diligently observe
A primitive root; properly, to hiss, i.e. Whisper a (magic) spell; generally, to prognosticate -- X certainly, divine, enchanter, (use) X enchantment, learn by experience, X indeed, diligently observe.
Englishman's Concordance
1) to practice divination, divine, observe signs, learn by experience, diligently observe, practice fortunetelling, take as an omen 1a) (Piel) 1a1) to practice divination 1a2) to observe the signs or omens Part of Speech: verb A Related Word by BDB/Strong’s Number: a primitive root Same Word by TWOT Number: 1348
Brown-Driver-Briggs
II. [נָחַשׁverb only
Pi`elpractise divination, divine, observe signs (denominative from נָהָשׁ according to NöZeitschr. f. Völkerpsychol. i (1860), 413 BauSemitic Rel. i. 287 LagBN 188 GerberVerb. Denom. 29; otherwise WeSkizzen iii. 147 MeiChrest. Targ. 8. see BaES 48 (against him see StaThLz April 28, 1894, 235); chief difficulty is that Aramaic, which has נַחֵשׁ, has no נָחָשׁ compare RSJPh.xiv. 115; — Late Hebrew Qal Participle נוֺחֵשׁ, and Pi`el; Aramaic Pa`el נַחֵשׁ, , all = divine, learn by omens; perhaps compare also Arabic be unlucky Lane2775 compare Mei1.c); — Perfect3masculine singular וְנִחֵשׁ2 Kings 21:6; 2Chronicles 33:6; 1 singular נִחַ֫שְׁתִּיGenesis 30:27; ImperfectיְגַחֵשׁGenesis 44:5,15; 3masculine plural יְנַחֲשׁוּ1 Kings 20:33, וַיְנַחָ֑שׁוּ2 Kings 17:17; 2masculine plural תְּנַחֲשׁוּLeviticus 19:26; Infinitive absoluteנַחֵשׁ1Kings 20:33; ParticipleמְנַחֵשׁDeuteronomy 18:10 (compare especially RSJPhoenician xiv. .113 ff.); —
1practise divinationGenesis 44:5 (J; by means of cup, i.e. by hydromancy), with implied power to learn secret things Genesis 44:15; condemned by prophetic writer 2 Kings 21:6 2Chronicles 33:6 (+ עוֺנֵן וְעָשָׂח אוֺבוְיִדְּעֹנִים), 2 Kings 17:17 ("" וַיִּקְסְמוּ קְסָמִים); forbidden in D and H: Deuteronomy 18:10 ( + קֹסֵם קְסָמִים מְעוֺנֵן וּמְכַשֵּׁף), Leviticus 19:26 (H; "" תְּעוֺנֵנ֑וּ).
2observe the signs or omensGenesis 30:27 (j); so probably יְנַחֲשׁוּ1 Kings 20:33 now the men were observing the signs.
Genesis 30:27 HEB:חֵ֖ן בְּעֵינֶ֑יךָ נִחַ֕שְׁתִּי וַיְבָרֲכֵ֥נִי יְהוָ֖ה NAS: it pleases you, [stay with me]; I have divined that the LORD KJV: in thine eyes, [tarry: for] I have learned by experience that the LORD INT: favour eyes have divined has blessed the LORD
Genesis 44:5 HEB:בּ֔וֹ וְה֕וּא נַחֵ֥שׁ יְנַחֵ֖שׁ בּ֑וֹ NAS: drinks and which he indeed uses for divination? KJV: drinketh, and whereby indeed he divineth? INT: my lord he indeed uses wrong
Genesis 44:5 HEB:וְה֕וּא נַחֵ֥שׁ יְנַחֵ֖שׁ בּ֑וֹ הֲרֵעֹתֶ֖ם NAS: and which he indeed uses for divination? You have done wrong KJV: and whereby indeed he divineth? ye have done evil INT: he indeed uses wrong which
Genesis 44:15 HEB:יְדַעְתֶּ֔ם כִּֽי־ נַחֵ֧שׁ יְנַחֵ֛שׁ אִ֖ישׁ NAS: a man as I can indeed practice divination? KJV: not that such a man as I can certainly divine? INT: ye can indeed practice A man
Genesis 44:15 HEB:כִּֽי־ נַחֵ֧שׁ יְנַחֵ֛שׁ אִ֖ישׁ אֲשֶׁ֥ר NAS: as I can indeed practice divination? KJV: as I can certainly divine? INT: can indeed practice A man that
Leviticus 19:26 HEB:תְנַחֲשׁ֖וּ וְלֹ֥א תְעוֹנֵֽנוּ׃ NAS: nor practice divination or soothsaying. KJV: [any thing] with the blood: neither shall ye use enchantment, nor observe times. INT: soothsaying nor practice
Deuteronomy 18:10 HEB:קְסָמִ֔ים מְעוֹנֵ֥ן וּמְנַחֵ֖שׁ וּמְכַשֵּֽׁף׃ NAS: one who practices witchcraft, or one who interprets omens, or a sorcerer, KJV: [or] an observer of times, or an enchanter, or a witch, INT: uses practices interprets A sorcerer
1 Kings 20:33 HEB: וְהָאֲנָשִׁים֩ יְנַחֲשׁ֨וּ וַֽיְמַהֲר֜וּ וַיַּחְלְט֣וּ NAS: Now the men took this as an omen, and quickly KJV: Now the men did diligently observe whether [any thing would come] from him, and did hastily INT: now the men took and quickly catching
2 Kings 17:17 HEB:וַיִּקְסְמ֥וּ קְסָמִ֖ים וַיְנַחֵ֑שׁוּ וַיִּֽתְמַכְּר֗וּ לַעֲשׂ֥וֹת NAS: divination and enchantments, and sold KJV: divination and enchantments, and sold INT: and practiced divination and enchantments and sold to do
2 Kings 21:6 HEB:בָּאֵ֔שׁ וְעוֹנֵ֣ן וְנִחֵ֔שׁ וְעָ֥שָׂה א֖וֹב NAS: practiced witchcraft and used divination, and dealt KJV: and observed times, and used enchantments, and dealt INT: the fire practiced and used and dealt mediums
2 Chronicles 33:6 HEB:הִנֹּ֔ם וְעוֹנֵ֤ן וְנִחֵשׁ֙ וְֽכִשֵּׁ֔ף וְעָ֥שָׂה NAS: and he practiced witchcraft, used divination, practiced sorcery KJV: also he observed times, and used enchantments, and used witchcraft, INT: of Hinnom practiced used practiced and dealt
, all = divine, learn by omens; perhaps compare also Arabic 
be unlucky Lane2775 compare Mei1.c); — Perfect3masculine singular