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Hebrew Lexicon

What is TWOT?

The Theological Wordbook of the Old Testament — what it is, and how BiblicalTools.org uses its reference numbers.

The Standard for Hebrew Word Studies

TWOT (Theological Wordbook of the Old Testament) is the definitive Hebrew lexicon for conservative evangelical scholars. Edited by R. Laird Harris, Gleason L. Archer Jr., and Bruce K. Waltke, it provides in-depth theological analysis of every significant Hebrew word in the Old Testament.

Unlike simple concordances, TWOT explores the theological significance of each word — how it develops throughout Scripture, its semantic range, and its role in biblical theology. First published in 1980, it remains the gold standard for Hebrew word studies.

BiblicalTools.org uses the TWOT numbering in its Bible Reader and lexicon: tap a Hebrew word and you see its TWOT reference number, the words that share its root, and the range of meaning from Brown-Driver-Briggs (1906) and Strong’s Hebrew Dictionary (1890), both in the public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers are shown for reference only; the TWOT articles are not reproduced here, so take the number to the Wordbook itself for the full article.

Why TWOT Matters

Theological Depth

TWOT doesn't just define Hebrew words — it explains their theological significance. Understand how words like hesed (lovingkindness), shalom (peace), and halak (walk) carry rich theological meaning throughout Scripture.

Semantic Analysis

Each entry explores the full semantic range of the Hebrew word — its various meanings, nuances, and how context shapes interpretation. See how a single Hebrew word can carry multiple layers of meaning.

Cross-References

TWOT provides extensive cross-references showing how each word is used throughout the Old Testament. Trace theological themes from Genesis to Malachi with scholarly precision.

Scholarly Rigor

Written by respected conservative Hebrew scholars, TWOT maintains academic excellence while staying true to the authority and inspiration of Scripture. Seminary-level resources for everyday believers.

TWOT Numbers in Action

Here's what the Bible Reader shows when you tap a Hebrew word that has a TWOT number

הָלַךְ
halak
TWOT 498

Range of meaning: go, come, walk; pass away, die, live; walking about, depart, go entirely away; walk about, move to and fro; lead, bring, lead away, carry, cause to walk, cause to flow, run, cause to depart, retire, go back; along, apace, behave…

Same root (TWOT 498a–e): הֵ֫לֶךְ hēlek, הָלִיךְ hālîk, הֲלִיכָה hălîkâ, מַהֲלָךְ mahălāk, תַּהֲלוּכָה tahălûkâ

Full range of meaning: one tap opens the Brown-Driver-Briggs senses stem by stem (Qal, Piel, Hithpael, Hiphil) and Strong’s definition with its list of renderings.

Read it in context: Genesis 5:22, Genesis 12:4, Deuteronomy 8:6, Psalm 1:1

Meanings: Brown-Driver-Briggs (1906) and Strong’s Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.

Frequently Asked Questions

What does TWOT stand for?
TWOT stands for Theological Wordbook of the Old Testament. It's a comprehensive Hebrew lexicon that provides theological and linguistic analysis of every significant Hebrew word in the Old Testament.
Who wrote the Theological Wordbook of the Old Testament?
TWOT was edited by R. Laird Harris, Gleason L. Archer Jr., and Bruce K. Waltke — three respected conservative Hebrew scholars. It was first published in 1980 and has become the standard reference for evangelical Hebrew word studies. The work represents contributions from over 40 evangelical scholars.
How is TWOT different from Strong's Concordance?
While Strong's Concordance provides brief definitions and concordance numbers, TWOT offers in-depth theological analysis. TWOT explains the semantic range of each Hebrew word, its theological significance, and how it develops throughout Scripture. Strong's is a quick reference tool; TWOT is a scholarly lexicon designed for serious word study.
How does BiblicalTools.org integrate TWOT?
BiblicalTools.org uses TWOT reference numbers in its interlinear Bible reader and lexicon. Click a Hebrew word in the Old Testament to see its TWOT number, the words that share its root, and the range of meaning from Brown-Driver-Briggs (1906) and Strong’s Hebrew Dictionary (1890), both in the public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). The TWOT articles themselves are not reproduced; for the full article, look the number up in the Wordbook. TWOT numbers cover more than 6,100 words (most proper names and rare terms have no TWOT number).
Do I need to know Hebrew to use TWOT?
No. Our interlinear reader shows the Hebrew, transliteration, and English translation side-by-side. Click a word to see its TWOT number and range of meaning where one exists — no Hebrew knowledge required.

Experience TWOT in Our Bible Reader

Tap Hebrew words as you read to see their TWOT numbers, root families and range of meaning

Open Bible Reader