The clearest use of la is to return to someone or something already introduced. First mention usually presents a new referent with zero article; later mention uses la to tell the listener, “I mean the same one.” Esperanto has no word corresponding to English a/an.
Mi vidis hundon antaŭ la vendejo. La hundo atendis sian posedanton.
I saw a dog in front of the shop. The dog was waiting for its owner.
At first, hundon introduces a dog that the listener cannot yet identify. In the second sentence, la hundo points back to that newly established dog. This new-to-given movement is not a translation trick; it is the article's central discourse function.
First mention and later mention
Use no article when you introduce an ordinary countable referent as new information. Once that referent is part of the conversation, use la when naming it again.
En la ĝardeno staris tablo. Sur la tablo kuŝis du libroj.
There was a table in the garden. Two books were lying on the table.
Hieraŭ telefonis nova kliento. La kliento volas renkonti nin vendrede.
A new client called yesterday. The client wants to meet us on Friday.
Mi mendis supon kaj sandviĉon. La supo estis varma, sed la sandviĉo estis malvarma.
I ordered soup and a sandwich. The soup was hot, but the sandwich was cold.
The first mention need not occur in the immediately preceding sentence. It only needs to remain identifiable in the shared conversation. If several possible tables, clients, or sandwiches have entered the discussion, la alone may no longer identify one; add a description or use a demonstrative.
La never changes form
The article is always la. It does not agree with singular or plural, and it never takes accusative -n. Those endings appear on the adjective and noun.
| Role | Form | Meaning |
|---|---|---|
| singular subject | la nova libro | the new book |
| plural subject | la novaj libroj | the new books |
| singular object | la novan libron | the new book |
| plural object | la novajn librojn | the new books |
Mi trovis du ŝlosilojn en la kuirejo kaj metis la ŝlosilojn sur vian skribotablon.
I found two keys in the kitchen and put the keys on your desk.
In la ŝlosilojn, la stays unchanged while the already identified plural object carries -j-n on ŝlosilojn.
The later label can be different
You do not have to repeat exactly the same noun. A new description can point back to an established referent if the connection is clear.
Virino en ruĝa mantelo eniris la kafejon. La gasto sidiĝis apud la fenestro.
A woman in a red coat entered the café. The guest sat down by the window.
Ni aĉetis malnovan biciklon. La veturilo bezonas novajn bremsojn.
We bought an old bicycle. The vehicle needs new brakes.
Here la gasto and la veturilo are not new people or objects. The definite article instructs the listener to connect the new label with the woman and bicycle already mentioned. This technique is common in neutral narration and avoids monotonous repetition.
The connection must be reasonable. If gasto could refer to several people already mentioned, choose a more explicit phrase such as la virino en la ruĝa mantelo.
Definiteness is not the same as specificity
A referent can be specific in the speaker's mind but still be new to the listener. In that case, do not use la merely because the speaker knows exactly which one is meant.
Mi serĉas certan libron, sed mi ne memoras la titolon.
I'm looking for a particular book, but I don't remember the title.
Certan libron is specific: the speaker has one particular book in mind. It is not yet definite for the listener, who cannot identify it. After enough information is supplied, la libro becomes possible.
La libro havas verdan kovrilon kaj temas pri astronomio. Ĉu vi vidis la libron?
The book has a green cover and is about astronomy. Have you seen the book?
In a natural conversation, those descriptions continue an already introduced certan libron, so la libro now points back to it. English often blurs “known to the speaker” and “identifiable to both parties”; Esperanto's most reliable test is shared identifiability.
Pronouns, possessives, and demonstratives
After introduction, a pronoun often continues the reference more naturally than repeating the noun.
Mi ricevis pakaĵon hodiaŭ. Ĝi venis el Japanio, sed la pakaĵo ne havas nomon de sendinto.
I received a package today. It came from Japan, but the package has no sender's name.
Both ĝi and la pakaĵo point to the same established package. Repeating the noun can refresh or contrast the topic; the pronoun simply maintains it.
A possessive or demonstrative already determines the noun phrase, so it normally replaces la, not combines with it.
Mi prenis mian jakon, kaj ŝi prenis tiun jakon apud la pordo.
I took my jacket, and she took that jacket by the door.
Say mia jako and tiu jako, not la mia jako or la tiu jako in ordinary Esperanto. These determiners identify the referent through possession or pointing rather than through la.
Zero article can introduce a different referent
Once one referent is active, another articleless occurrence of the same noun typically introduces a new one.
Mi parolis kun kuracisto en la kliniko. Poste la kuracisto foriris, kaj alia kuracisto venis.
I spoke with a doctor at the clinic. Later the doctor left, and another doctor came.
La kuracisto is the first doctor. Alia kuracisto explicitly introduces a different doctor. Even without alia, zero article can signal a new doctor if the context supports that reading.
— Ĉu vi riparis la lampon? — Ne, mi aĉetis novan lampon.
— Did you repair the lamp? — No, I bought a new lamp.
The question assumes an already known lamp. The answer's novan lampon introduces a replacement, not the same object.
Common Mistakes
Inventing an indefinite article
❌ Mi vidis unu katon. La kato dormis.
Wrong if unu is meant only as English ‘a’: unu emphasizes exactly one cat.
✅ Mi vidis katon. La kato dormis.
I saw a cat. The cat was sleeping.
Omitting la on the second mention
❌ Mi aĉetis telefonon. Telefono jam ne funkcias.
Incorrect for the same phone: zero article makes telefono sound generic or newly introduced.
✅ Mi aĉetis telefonon. La telefono jam ne funkcias.
I bought a phone. The phone no longer works.
Giving la an accusative ending
❌ Mi legis lan artikolon hieraŭ.
Incorrect: la is invariant and never takes -n.
✅ Mi legis la artikolon hieraŭ.
I read the article yesterday.
Combining la with another determiner
❌ La tiu aŭto estas tre laŭta.
Incorrect in ordinary Esperanto: tiu already determines aŭto.
✅ Tiu aŭto estas tre laŭta.
That car is very loud.
Using la for private specificity
❌ Mi volas paroli kun la specialisto, sed vi ne scias, kiun mi celas.
Incorrect in this context: the listener cannot identify the specialist.
✅ Mi volas paroli kun certa specialisto, sed vi ne scias, kiun mi celas.
I want to speak with a particular specialist, but you don't know whom I mean.
Key Takeaways
- Introduce a new ordinary referent with zero article; use la when returning to the identifiable referent.
- La is invariant; plural and accusative endings belong to adjectives and nouns.
- The later noun may use a new label if the connection is clear.
- Specific to the speaker does not automatically mean definite for the listener.
- Possessives and demonstratives normally replace la.
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Start learning Esperanto →Related Topics
- The Definite Article LaA1 — How invariant la marks a referent that the listener can identify, and when another determiner or zero article is required.
- When Esperanto Uses Zero ArticleA1 — How bare noun phrases express new, indefinite, generic, mass, predicative, and name-based meanings without an article.
- No Indefinite ArticleA1 — How bare Esperanto noun phrases express English a, an, and some without inventing a new article.
- Demonstrative DeterminationA1 — How tiu, ĉi tiu, and tia identify an individual or a type without combining with la.
- Possessives as DeterminersA1 — How mia, via, lia, and the other possessive forms identify a noun phrase and agree with the possessed item.
- Given and New InformationB2 — Arrange accessible information before newly introduced or contrastive material while using articles, pronouns, case, and word order to guide the listener.