The basic meaning of kun is accompaniment: one participant, thing, or circumstance is present together with another. That core extends naturally to joint action, possession or associated features, and manner. English “with,” however, also marks instruments, topics, affected people, and opponents; Esperanto normally uses more precise prepositions for those roles.
Accompaniment: present together
Use kun when people or things accompany one another:
Mi iros al la koncerto kun du amikoj el la universitato.
I will go to the concert with two friends from university.
Ĉu vi volas kafon kun lakto aŭ sen lakto?
Would you like coffee with milk or without milk?
The companion is not automatically an equal agent. In Mi iris kun Ana, both people went; in Mi prenis la dokumentojn kun mi, the documents accompanied me but did not act.
Prenu pluvombrelon kun vi; posttagmeze eble pluvos.
Take an umbrella with you; it may rain this afternoon.
Like other ordinary prepositions, kun itself marks the relation, so its complement normally has no accusative -n: kun ŝi, kun la infanoj, kun freŝa pano.
Joint action and interaction
With a plural activity, kun introduces another participant in the same event:
Mi kuiris kun mia frato, dum la aliaj aranĝis la tablon.
I cooked with my brother while the others set the table.
La esploristoj kunlaboras kun loka universitato pri la projekto.
The researchers are collaborating with a local university on the project.
Many interaction verbs conventionally take this relation: paroli kun iu, diskuti kun iu, konsenti kun iu, renkontiĝi kun iu, kompari ion kun io. The other participant need not agree: two people may diskuti kun one another while defending opposite positions.
— Ĉu vi jam parolis kun la posedanto? — Jes, sed ni ankoraŭ ne konsentis pri la prezo.
— Have you spoken with the owner yet? — Yes, but we still have not agreed on the price.
Notice the distinct roles in that exchange: kun la posedanto identifies the interlocutor; pri la prezo identifies the topic. A single English “with” construction can hide that distinction.
An associated feature or possession
Kun can attach a feature, content, or possession to a noun:
Ni rezervis trankvilan ĉambron kun balkono super la ĝardeno.
We booked a quiet room with a balcony overlooking the garden.
La viro kun la ruĝa ĉapelo estas nia nova najbaro.
The man with the red hat is our new neighbor.
The kun phrase behaves much like a reduced relative clause: la viro, kiu portas/havas la ruĝan ĉapelon. Its attachment must therefore be clear. A phrase placed after a noun usually describes that noun; placed near a verb, it may instead describe how the event happens.
Mi vidis viron kun binoklo.
I saw a man with binoculars.
That sentence is genuinely ambiguous about accompaniment: the man may have the binoculars, or I may merely have them with me. It does not neutrally say that I used them to see. For that instrumental meaning, say Mi vidis viron per binoklo. If the man carried them, Mi vidis viron, kiu portis binoklon removes the competing attachment. The attachment ambiguity is structural, but the kun/per contrast still identifies accompaniment versus actual means.
Manner and accompanying circumstance
A feeling, posture, or visible circumstance can accompany an action:
Ŝi akceptis la kritikon kun surpriza trankvilo.
She accepted the criticism with surprising calm.
La infano malfermis la donacon kun granda rideto.
The child opened the present with a broad smile.
Here trankvilo and rideto are not tools. They characterize the circumstances or manner. An adverb often offers a tighter alternative: trankvile akceptis, ridete malfermis. The versions are close but not identical. Kun granda rideto presents a concrete accompanying expression; ridete compresses it into the manner of the action.
Physical accompanying conditions work similarly:
La trajno alvenis kun dudekminuta malfruo.
The train arrived twenty minutes late.
This is neutral everyday usage. In formal operational writing, La trajno malfruis dudek minutojn states the measured delay more directly.
Companion or instrument: kun versus per
Use per for the means, tool, channel, or method by which an action succeeds. Use kun for something merely accompanying the agent or event:
Ni vojaĝis al Prago kun niaj najbaroj per nokta trajno.
We traveled to Prague with our neighbors by night train.
Ŝi tranĉis la ŝnuron per poŝtranĉilo, kiun ŝi ĉiam portas kun si.
She cut the rope with a pocketknife that she always carries with her.
The neighbors are companions; the train is the means of transport. The knife is the instrument of cutting but accompanies its owner at other times. This semantic contrast is stable even though English uses “with” in several of the translations. The Per page develops the broader contrast between means and accompanying circumstance.
Sometimes the same noun permits either construal:
Li venis kun bastono, sed li malfermis la pordon per la bastono.
He came with a stick, but he opened the door with the stick.
The first bastono is an accompanying object. The second is deliberately used as an instrument.
Ally, interlocutor, or opponent
Kun presents another person as a co-participant. Kontraŭ presents that person as the opposing side:
Ni ludis kun la infanoj en la ĝardeno, poste nia teamo ludis kontraŭ la najbaroj.
We played with the children in the garden; afterward our team played against the neighbors.
With verbs such as lukti and batali, usage can be less tidy. Batali kun iu may mean fighting alongside someone or engaging in a reciprocal fight with that person. Batali kontraŭ iu unambiguously identifies the opponent. When the distinction matters, name the ally with kune kun or the opponent with kontraŭ.
La volontuloj batalis kune kun la fajrobrigado kontraŭ la arbara incendio.
The volunteers fought alongside the fire brigade against the forest fire.
The two prepositional phrases assign different roles in one clause.
When English “with” is not kun
Several frequent English patterns require another Esperanto relation:
| Intended role | Esperanto | Why |
|---|---|---|
| instrument | skribi per krajono | the pencil is used as a means |
| topic/problem | problemo pri la konto | the account is what the problem concerns |
| affected possessor | Kio okazis al vi? | you are the person affected |
| opponent | konkuri kontraŭ alia teamo | the team is on the other side |
Kio okazis al via telefono? La ekrano estas tute nigra.
What happened to your phone? The screen is completely black.
Older or less careful texts sometimes use broad kun in a way modeled on national-language idioms—for example, for a problem “with” something. The meaning is often recoverable, but modern neutral Esperanto favors the precise relationship al, pri, per, or kontraŭ.
Derived forms and compounds
Kune means together; kuniĝi means come together, join, or unite; kunigi means bring together or join things. These forms preserve accompaniment while changing the grammar of the sentence:
Ni solvos la problemon kune, sed unue ni devas kunigi ĉiujn disponeblajn informojn.
We will solve the problem together, but first we must bring together all the available information.
Prefix-like kun- appears in established words such as kunlabori, kunloĝi, kunporti, and kunulo. It can mean joint participation, coexistence, or carrying something along. Because those relationships differ, do not coin a dense kun- compound when an ordinary kun phrase would be clearer.
Norm and register
Accompaniment, joint action, associated features, and accompanying manner are standard in every register. Kune kun is useful for emphasis or to prevent an ally from being mistaken for an opponent. It is not “more grammatical” than plain kun.
Instrumental kun occurs under influence from other languages and may be understood, but per is the established neutral choice. Broad topic or affected-person kun is likewise best avoided where a conventional preposition exists. In (formal) and (academic) prose, resolving attachment ambiguity is particularly important because kun phrases can otherwise modify more than one nearby element.
Common Mistakes
Adding accusative after kun
❌ Mi iris al la kuracisto kun ŝin.
Incorrect — an ordinary kun complement does not take accusative -n.
✅ Mi iris al la kuracisto kun ŝi.
I went to the doctor with her.
Using kun for an instrument
❌ Ŝi malfermis la pakon kun tondilo.
Incorrect for the intended instrument reading — use per for the tool.
✅ Ŝi malfermis la pakon per tondilo.
She opened the package with scissors.
Using kun for the target of an unfavorable feeling
❌ Mi estas kolera kun vi pro tiu mensogo.
Incorrect for the intended target — kun presents accompaniment, not hostile orientation.
✅ Mi estas kolera kontraŭ vi pro tiu mensogo.
I am angry with you because of that lie.
Leaving an opponent ambiguous
❌ Ni batalos kun la plej forta teamo morgaŭ.
Ambiguous for the intended opponent reading — kun can also suggest cooperation.
✅ Ni batalos kontraŭ la plej forta teamo morgaŭ.
We will fight against the strongest team tomorrow.
Key Takeaways
- Kun marks accompaniment, joint participation, associated features, and accompanying circumstances.
- Its complement normally has no -n.
- Use per for an instrument or means, even where English says “with.”
- Use pri for a topic, al for an affected person or thing, and kontraŭ for an opponent.
- Resolve attachment ambiguity when a kun phrase might describe either a noun or the action.
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Start learning Esperanto →Related Topics
- SenB2 — Use sen for absence, including common sen + infinitive constructions and careful handling of negative scope.
- PerB1 — Use per for an instrument, means, method, channel, or intermediary through which an action is carried out.
- KontraŭB1 — Use kontraŭ for facing or opposing direction, resistance and protection, contact, and what is exchanged for something else.
- PriB2 — Use pri to mark a topic, concern, or matter that an action, text, thought, or relationship is about.
- Prepositional Phrase AttachmentB1 — Show clearly whether an Esperanto prepositional phrase belongs to a verb, noun, adjective, or whole clause.
- Verb-Preposition FramesB1 — Learn which Esperanto verbs take direct objects and which select al, pri, de, kun, or je—and how the frame changes meaning.