The Three Atlases:
A Map of English Word-Building

145 prefixes. 94 suffixes. 99 Latin and Greek roots. All cross-linked. Click any morpheme in any word and walk the entire landscape.

From List to Landscape

The standard way to learn vocabulary is by list. Pick up perfidy, memorise the meaning, move on. Pick up fidelity, memorise it separately. Pick up confidante, again separately. Three words, three flashcards, three independent acts of memory.

But these are not three separate words. They share a Latin root — fid, “faith” or “trust” — and once you see it, the connections rearrange themselves. Perfidy is broken faith. Fidelity is kept faith. A confidante is one with whom you share faith. Three words become one idea with three faces.

English does this everywhere. The 119,000 words in our dictionary are not arbitrary symbols. They are recombinations of a smaller set of building blocks — prefixes, suffixes, and roots — drawn mostly from Latin, Greek, and Old English, and stacked together over fifteen centuries.

Lemmerly now exposes those building blocks directly. Three browseable Atlases map the morpheme landscape. Each prefix, suffix, and root has its own page. Each page lists the words that use it. And every visible morpheme — anywhere in the system — is clickable. Click pre- in prediction and you land on the prefix Atlas page for pre-. Click -ion and you jump to the suffix Atlas. Click dict and you land on the root.

The Roots Atlas

Roots are the deepest layer. They are the meaning-bearing cores that prefixes and suffixes cluster around. The Latin root vid (and its variant vis) means “to see” — and from it English builds vision, video, visible, evident, supervise, revise, visa, and dozens more.

The roots Atlas decomposes each word visually. Advisable shows as ad + vis + able. Devisee shows as de + vis + ee. The prefix is one colour, the root is another, the suffix is a third. Each part is clickable. The decomposition is not commentary — it is the page.

We chose 99 roots — the ones that pull the most weight in English vocabulary. The Latin dict (to say) underlies predict, contradict, dictate, benediction, edict, indictment. The Greek graph (to write) anchors photograph, biography, autograph, telegram, calligraphy. The Greek log (study, word) generates the entire -ology family — biology, psychology, theology, geology, and a hundred more.

Some words decompose into multiple roots. Biography contains bio (life) and graph (to write). Anthropography has anthrop (human) and graph. Theology has theo (god) and log (study). The Atlas marks these multi-root words and links to all the roots that built them.

The Prefix Atlas

Prefixes attach to the front of a word and modify its meaning. English has 145 of them, drawn mostly from Latin and Greek with a handful from Old English. They fall naturally into nine categories: negation (un-, dis-, anti-), direction (pre-, sub-, trans-), number (uni-, bi-, poly-), size and degree (mega-, micro-, hyper-), time (pre-, post-, re-), evaluation (eu-, dys-, pseudo-), togetherness (con-, syn-, co-), self and other (auto-, hetero-, xeno-), and thematic (bio-, geo-, hydro-, tele-).

The prefix Atlas opens with this nine-category map. Each prefix has its own detail page with origin, meaning, sister variants (im-, il-, ir- are all phonetic variants of in-), and the full list of English words that begin with it.

The word lists separate “clean derivations” from “etymological matches.” Counteract is a clean derivation: strip the prefix and you get act, itself an English word. Antarctic is an etymological match: strip ant- and you get arctic, which works, but the relationship is more historical than felt. Most vocabulary apps hide this distinction. We surface it. The clean ones teach the prefix; the etymological ones teach English's history.

The Suffix Atlas

Suffixes attach to the end. They typically don't change meaning so much as change part of speech. Add -tion to a verb and you get a noun (act → action). Add -ize to an adjective and you get a verb (modern → modernize). Add -ous to a noun and you get an adjective (danger → dangerous).

The suffix Atlas groups its 94 entries by what they do, not what they mean — noun-forming, adjective-forming, verb-forming, adverb-forming, comparative.

One feature is worth singling out. Some suffixes do more than one job. The suffix -ate is verb-forming in activate, demonstrate, create— but adjective-forming in passionate, fortunate, intricate. Same letters, two different functions. Most references quietly pick one and ignore the other. Lemmerly shows both, side by side, and tells you which words fall where — without pretending to know which sense applies to a given word.

Why It Matters

A vocabulary list teaches you words. A morphology atlas teaches you how to decode words you have never seen.

A reader who knows the root dict, the prefix contra-, and the suffix -ory can encounter the unfamiliar word contradictoryand resolve its meaning on first sight: against + speak + relating to. A reader who has only memorised flashcards has to look it up.

This is the leverage. The 250 morphemes in the Atlases generate, recombine, and decode tens of thousands of words. Once a learner internalises the building blocks, vocabulary stops being a memory game and becomes a logic game. New words on a GRE or CAT or UPSC paper become solvable rather than recalled.

Cross-Linking the Landscape

The three Atlases are not three separate references. They are one navigable graph. Open the root page for dict and you see the word contradictory decomposed as contra + dict + ory. Click contra and you land on the prefix Atlas page for contra-. Click ory and you land on the suffix Atlas. Click dict and you go to the dictionary entry for the word itself, with its definition, examples, etymology, and synonyms.

Each word in our 119,000-word dictionary now sits at an intersection of these three Atlases. We can show you, for any word, the prefixes it carries, the suffixes it ends with, and the roots it descends from. The morphological fingerprint of every word is now part of its dictionary entry — and it links back into the Atlases.

What This Is And Isn't

We have not invented English morphology. The roots, prefixes, and suffixes have been documented for centuries. Etymological dictionaries, etymonline.com, academic morphology references — all of these exist. What we have built is the first time, that we know of, that all three layers have been integrated into a single navigable surface inside a working vocabulary platform — wired to a live dictionary, an ELO rating system, and bilingual support.

We are also explicit about what we do not know. Some prefixes and suffixes have multiple senses; we show all senses without picking one. Some words decompose cleanly; others are etymological matches whose stems aren't standalone English words; we label both honestly. Some words in our database have only their morphology and a definition pending; we mark them and don't expose them until the data is ready.

The Atlases are reference content. There is no quiz, no timer, no ELO impact. They exist for browsing — to follow a thread of curiosity from one morpheme to another, and back to the dictionary, and on to the next word. That is the whole product.