BDB

What BDB is

BDB is a Hebrew-and-Aramaic-to-English lexicon — a learned dictionary of the vocabulary of the Old Testament, published in 1906 by Francis Brown, S. R. Driver, and Charles Briggs. For each word it documents the meanings, the forms, the verses where it occurs, and notes on derivation and on related words in other Semitic languages. Its defining trait is the arrangement: words are grouped under their three-letter Hebrew roots rather than listed individually in strict alphabetical order, so related words appear together and a reader sometimes has to identify a word's root to find it.

The lexicon grew out of the earlier Hebrew dictionary of Wilhelm Gesenius, which Brown, Driver, and Briggs translated and substantially expanded into the reference that carries their names. Because the 1906 text is in the public domain, it is free online and built into nearly every Bible study app and site, frequently keyed to Strong's numbers so that an English-only reader can reach an entry without searching the Hebrew. Affordable print editions also remain in circulation. It assumes a reader with at least some Hebrew for full use, though its wide, free, Strong's-linked availability makes it the most accessible serious Hebrew lexicon there is.

Why readers still rely on BDB

The single biggest reason BDB is still everywhere is that it is both serious and free. It is not a thin glossary — it is a deeply learned lexicon, built on Gesenius and expanded by three major scholars, with rich entries that document a word's meanings, forms, and relatives. And because the 1906 edition is in the public domain, that depth costs nothing: the data is built into Blue Letter Bible, Bible Hub, e-Sword, and most study apps, frequently keyed to Strong's numbers. The combination — a genuine scholarly reference available at no cost in nearly every tool — is something none of the modern, copyrighted lexicons can match.

For many readers, the Strong's-keyed access is what opens the door. You do not have to search the Hebrew alphabet to reach a BDB entry; in most apps you tap an English word, follow its Strong's number, and arrive at the lexicon's account of the underlying term. That makes BDB the natural next layer for a reader who already uses a Strong's-keyed study tool and wants more than a one-line gloss. The root-based organization rewards a little practice, too — seeing a whole family of related words gathered under one root is a genuine aid to word study once the system clicks. For going one careful step deeper into the Hebrew without a major purchase, nothing is more accessible.

Root-based organization: a word family at a glance

BDB groups its entries under three-letter Hebrew roots rather than listing each word alphabetically on its own. Under a given root sit the verb and the various nouns, adjectives, and related forms that derive from it, so a reader looking up one word sees the whole family it belongs to. For Hebrew, where so much of the vocabulary is built transparently from roots, this arrangement mirrors the way the language actually works and surfaces connections an alphabetical list would scatter across the volume.

It is also the feature that frustrates new users first. To find a word you sometimes have to know or deduce its root, and a beginner who has not yet learned to strip prefixes and suffixes can spend real effort just locating an entry — which is one reason the Strong's-keyed digital versions, where a number takes you straight to the entry, are so widely used. Once the system clicks, though, the root organization becomes an advantage rather than an obstacle: it turns every lookup into a small lesson in how a word relates to its kin, which is exactly the perspective careful word study wants.

Public domain and Strong's-keyed: serious Hebrew for free

Because the 1906 edition is out of copyright, BDB's full text is free to reproduce, and it has been — built into Blue Letter Bible, Bible Hub, StudyLight, e-Sword, Olive Tree, and many more, usually at no cost. Crucially, most of these implementations key BDB to Strong's numbers, so a reader can reach an entry from the English side: tap a word in a Strong's-linked Bible, follow the number, and land on BDB's account of the original term. That bridge lets a reader with little or no Hebrew use a real lexicon, not just a gloss, which is a rare thing to get for free.

This sounds like a licensing footnote. In practice it is the reason a 1906 reference is still in daily use in 2026. A modern, copyrighted lexicon like HALOT is more current, but it has to be bought; BDB is already in the tool you are holding. For the enormous number of readers who study with free apps and Strong's numbers, BDB is the deep reference within reach at the moment they want it, and its constant, no-cost availability across the ecosystem is what keeps it relevant long after a purely scholarly verdict would have retired it.

A learned classic — used with awareness of its date

BDB is a rich, scholarly lexicon, not a simplified study aid. Its entries are detailed and carefully argued, drawing on the comparative-Semitic learning of its day and on the Gesenius tradition behind it, and for a great many words its treatment remains genuinely useful and, in its thoroughness, sometimes preferred even by readers who own newer references. As a serious account of Old Testament vocabulary it has earned its century of use, and it still repays close reading.

It is also a product of 1906, and that should shape how it is used. The study of biblical Hebrew has advanced — through new texts, new comparative data, and refinements in method — so some of BDB's etymological and philological judgments are now disputed or simply superseded, and a careful reader checks its conclusions against more recent work where it matters. None of that erases its value; it locates it. BDB is best treated as a deeply learned classic and an accessible first reference, with a modern lexicon like HALOT consulted alongside it when a question turns on the current state of scholarship.

Pricing

Where BDB falls behind

Dated scholarship. BDB was published in 1906, and the study of biblical Hebrew has moved on through new texts, new comparative evidence, and refinements in method. The lexicon remains learned and useful, but some of its etymological and philological judgments are now disputed or superseded, and a careful reader checks its conclusions against more recent work where a question turns on the current consensus. For the latest scholarship, HALOT is the stronger reference.

Root-based lookup. The arrangement under three-letter roots is an advantage once mastered but a genuine hurdle at the start. To find a word you sometimes have to identify its root first, which means stripping prefixes and suffixes a beginner may not yet recognize. The Strong's-keyed digital versions largely solve this by letting a number take you straight to the entry, but the underlying print logic assumes a reader comfortable with Hebrew roots.

Assumes Hebrew for full use. Although Strong's-keyed access in apps lets an English-only reader reach the entries, the content itself assumes you can read the script and follow the notation. A reader with no Hebrew can get value from BDB through a Strong's number, but the depth of an entry — its discussion of forms, derivations, and cognates — is written for someone who works in the language, so the full benefit comes only with some Hebrew behind you.

Rough free copies. Because the public-domain text floats freely across the internet, the version you land on can carry old typesetting, awkward abbreviations, or transcription quirks. Clean, well-formatted editions exist — in the better apps and in modern print — but a reader who grabs the first free PDF may get a rougher experience than a curated implementation like Blue Letter Bible provides.

BDB vs. HALOT vs. Strong's Exhaustive Concordance

Different roles, often used together. BDB is the classic, free, deeply learned Hebrew lexicon — organized by root, dated in places, but rich and available at no cost in nearly every study tool, frequently keyed to Strong's numbers. For a student learning Hebrew, a budget-conscious reader, or anyone who wants the classic treatment, it is the accessible foundation, and many serious readers keep using it for its thoroughness long after they own newer references.

HALOT is the modern standard — more current, with a strong comparative-Semitic apparatus and the scholarly consensus much recent work is keyed to. Where BDB reflects 1906 lexicography, HALOT reflects the present, and for cutting-edge exegesis it is the stronger reference. The trade-off is cost: HALOT must be bought and runs into the hundreds of dollars, where BDB is free. The common pattern is to use BDB as the everyday, in-app reference and reach for HALOT when a question turns on the latest scholarship — which is why many students own both.

Strong's Exhaustive Concordance is not a lexicon but the numbering and index that connect a reader to one. Strong's finds where a word appears and gives each original term a number with a brief gloss; BDB is the fuller Hebrew lexicon that the Strong's number can point you to in most apps. They are natural partners: Strong's gets you from the English word to the right entry, and BDB supplies the learned account of what that Hebrew word means. A reader using a Strong's-keyed tool is, very often, reading BDB on the other end of the number.

Alternatives to BDB