English has an enormous vocabulary, but a large share of the long words are assembled from a small inventory of borrowed parts. Telephone is far-sound. Transport is carry-across. Biography is life-writing. Learn the parts and a great deal of unfamiliar vocabulary becomes readable on first encounter.
Prefixes carry direction and negation
| Prefix | Meaning | Examples |
|---|---|---|
| pre- | before | predict, prevent, preview |
| post- | after | postpone, postwar |
| sub- | under | submarine, subway, subtract |
| super- | above, beyond | supervise, superior |
| trans- | across | transport, translate |
| inter- | between | interrupt, international |
| circum- | around | circumference, circumvent |
| contra- / counter- | against | contradict, counteract |
| a- / an- | without (Greek) | atypical, anonymous |
| syn- / sym- | together (Greek) | synthesis, sympathy |
Latin roots
| Root | Meaning | Examples |
|---|---|---|
| dict | say | predict, dictate, contradict |
| port | carry | transport, export, portable |
| scrib / script | write | describe, manuscript, scripture |
| spect | look | inspect, spectator, respect |
| duc / duct | lead | conduct, produce, educate |
| vid / vis | see | video, vision, evident |
| ven / vent | come | convene, prevent, adventure |
| mit / miss | send | transmit, mission, dismiss |
| cred | believe | credible, credit, incredulous |
| fac / fect | make | factory, effect, manufacture |
| ject | throw | reject, project, injection |
| tract | pull | attract, extract, tractor |
Combine a prefix with a root and the meaning falls out. Retract is pull-back. Distract is pull-apart. Contract is pull-together — which is why a contract binds parties and a muscle contracts, two senses that look unrelated until the root explains them.
Greek roots
| Root | Meaning | Examples |
|---|---|---|
| graph | write | photograph, biography, graphic |
| phon | sound | telephone, symphony, phonetics |
| chron | time | chronology, synchronise |
| bio | life | biology, antibiotic |
| geo | earth | geography, geology |
| path | feeling, suffering | sympathy, pathology |
| psych | mind | psychology, psychiatric |
| therm | heat | thermometer, thermal |
| micro / macro | small / large | microscope, macroeconomics |
| poly | many | polyglot, polygon |
| auto | self | automatic, autobiography |
| tele | far | television, telescope |
Greek pieces normally join Greek pieces. Television breaks the convention — Greek tele plus Latin vision — and was criticised for it when the word was coined. The tidy all-Greek form would have been something like telescope, which was already taken.
Decoding an unfamiliar word
Take chronobiology. Split it: chrono (time), bio (life), logy (study of). The study of biological timing — which is exactly right, and required no prior contact with the term.
| Word | Parts | Meaning |
|---|---|---|
| xenophobia | xeno + phobia | fear of foreigners |
| anthropomorphic | anthropo + morph | having human form |
| circumnavigate | circum + navig | sail around |
| malevolent | male + vol | wishing badly |
| omniscient | omni + sci | knowing everything |
The payoff across languages
This stock is not English property. The Romance languages inherit the Latin roots directly, and scientific vocabulary built on Greek is shared across Europe.
| English | French | Spanish | Italian | German |
|---|---|---|---|---|
| telephone | téléphone | teléfono | telefono | Telefon |
| biology | biologie | biología | biologia | Biologie |
| transport | transport | transporte | trasporto | Transport |
Learning fifty roots is therefore not a single-language investment. It hands you a shared technical vocabulary across most of Europe at once, and it is one of the highest-return things a reader can do with an afternoon.
One caution
Roots give an excellent first guess, not a guarantee. Meanings drift: decimate meant to kill one in ten and now means to devastate; nice comes from Latin nescius, ignorant. Use the analysis to form a hypothesis, then confirm it in a dictionary — which is faster than looking the word up cold, and teaches you more.
Check a root across languages
The same Greek and Latin stock turns up in French, Spanish, Italian, German and Russian. NDT Studio's free offline dictionaries cover 45 pairs.
Open the dictionary appFrequently asked questions
Are Greek and Latin roots worth learning if I only want English?
Yes, particularly for academic and technical vocabulary, where the density of borrowed roots is highest. Words you have never seen frequently decode on sight once the components are familiar, which is a compounding advantage in reading.
Do these roots help with other languages too?
Considerably. French, Spanish, Italian, Portuguese and Romanian inherit the Latin stock directly, and scientific vocabulary built on Greek roots is shared across most European languages including German and Russian. One root learned pays out repeatedly.
Can I always trust a root analysis?
Not always. Meanings drift, and some words look decomposable but are not. A nice example is that decimate originally meant to kill one in ten. Roots are an excellent first guess that should be confirmed rather than a guarantee.