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Bible Word Study

כֶּחָשׁ

kechâsh · faithless

H3586noun1 occurrences
BDB Hebrew LexiconH3586noun

כֶּחָשׁ

kechâshkekh-awsh'

faithless

Definition

The Hebrew noun כֶּחָשׁ (kechâsh) refers to a state or quality of being 'faithless' or 'deceitful,' describing a person who is untrustworthy and breaks commitments. It specifically denotes a deep-seated dishonesty that violates relational trust, often in a covenant context. In its sole biblical occurrence in Isaiah 30:9, it characterizes rebellious Israel as a 'faithless people' who refuse to listen to God's instruction. The term implies more than a simple lie; it conveys a persistent, willful rejection of truth and fidelity.

Biblical Usage

This word is used only once in the Old Testament, in Isaiah 30:9, where the prophet Isaiah confronts the people of Judah. The context is a prophetic rebuke, labeling the nation as 'a rebellious people, lying children, children that will not hear the law of the LORD.' Here, 'faithless' (כֶּחָשׁ) is paired with 'rebellious,' highlighting their active, deceitful refusal to obey God's covenant commands. The usage is entirely within a prophetic condemnation of covenant betrayal.

Etymology

The noun כֶּחָשׁ derives from the root verb כָּחַשׁ (kāchash, H3584), which means 'to deny,' 'to lie,' or 'to fail.' This root conveys the idea of proving false or deceptive. The noun form intensifies this concept into a characterizing trait—a settled condition of faithlessness. Cognate words in related Semitic languages also carry meanings of denial and falsehood, reinforcing the core idea of deceptive speech or action that breaks trust.

Semantic Range

This word is theologically significant as it captures a central biblical theme: covenant faithfulness versus betrayal. In Isaiah 30:9, it diagnoses Israel's spiritual condition not merely as occasional sin but as a fundamental character of faithlessness toward God. Understanding this Hebrew term enriches reading by revealing that biblical 'lying' is often relational treachery against God, breaking the trust inherent in His covenant. It underscores that truthfulness is a core requirement for a right relationship with God. In ancient Israel's covenant-based society, faithfulness (אֱמֶת, emet) was paramount for social and religious stability. To be labeled 'faithless' (כֶּחָשׁ) was a severe accusation, implying a breakdown in one's most sacred relational commitments, especially to God. This cultural understanding goes beyond modern notions of telling a lie to encompass a complete failure of loyalty and integrity within a bonded relationship, making it a charge of ultimate disloyalty. שֶׁקֶר (sheqer, H8267) — a more general term for a 'lie' or 'falsehood,' often referring to deceptive speech. כָּזָב (kazav, H3577) — denotes a 'lie' or 'deception,' frequently in prophetic contexts against false visions. עָוֺל (ʿavol, H5766) — conveys 'injustice' or 'perversity,' a broader moral wrong that can include deceit.

Word Details

Strong's NumberH3586
LanguageHebrew (Biblical)
Part of Speechnoun
Hebrew Formכֶּחָשׁ
Transliterationkechâsh
Pronunciationkekh-awsh'
How this works

Definitions are from the Brown-Driver-Briggs Hebrew Lexicon (BDB, 1906, public domain). Concordance and morphology data are from the OSHB (Open Scriptures Hebrew Bible).

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References

  1. Abbott-Smith, G. (1921) A Manual Greek Lexicon of the New Testament. Edinburgh: T&T Clark. [Public Domain]
  2. Brown, F., Driver, S.R. and Briggs, C.A. (1906) A Hebrew and English Lexicon of the Old Testament. Oxford: Clarendon Press. [Public Domain]
  3. Tyndale House, Cambridge (n.d.) Tyndale Brief lexicon of Extended Strongs for Greek (TBESG). STEPBible. Available at: https://www.stepbible.org. [CC BY 4.0]
  4. Tyndale House, Cambridge (n.d.) Translators Formatted full LSJ (TFLSJ). STEPBible. Available at: https://www.stepbible.org. [CC BY 4.0]
  5. Thayer, J.H. (1889) A Greek-English Lexicon of the New Testament. [Public Domain]
  6. Gesenius, W. (1846) Gesenius' Hebrew-Chaldee Lexicon to the Old Testament. [Public Domain]
  7. Dodson, J. (2010) Greek Lexicon. Biblical Humanities. [CC0]

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