Sen marks something absent or lacking: kafo sen sukero, iri sen ombrelo, foriri sen adiaŭi. It is the usual opposite of kun when accompaniment or possession is absent, and sometimes the opposite of per when a means or instrument is missing. Its complement is unmarked, but its interaction with infinitives and other negatives requires attention to scope.
Absence of a thing, person, or quality
The noun phrase after sen names what is not present.
Mi trinkas kafon sen sukero, sed kun iom da lakto.
I drink coffee without sugar but with a little milk.
Ne eliru sen jako; ekstere estas multe pli malvarme ol hieraŭ.
Do not go out without a jacket; it is much colder outside than yesterday.
Ĉu vi venis sen Marta? — Jes, ŝi devis labori ĝis malfrue.
Did you come without Marta? — Yes, she had to work late.
The complement remains without accusative: sen sukero, sen jako, sen Marta. Sen already supplies the grammatical relation, and absence has no directional endpoint.
The missing element can be abstract.
La teamo finis la projekton sen ekstera helpo.
The team finished the project without outside help.
Li subskribis la dokumenton sen ajna dubo pri la kondiĉoj.
He signed the document without any doubt about the conditions.
Sen versus kun, per, and krom
Kun adds accompaniment or an associated feature; sen removes it.
La unua ĉambro havas balkonon, sed la pli malmultekosta estas sen balkono.
The first room has a balcony, but the cheaper one has no balcony.
When an instrument is missing, sen contrasts with per:
Mi malfermis la skatolon sen tranĉilo, kvankam estus pli facile per unu.
I opened the box without a knife, although it would have been easier with one.
Here English “with” corresponds to instrumental per, not accompanying kun. Sen tranĉilo simply states absence and does not force the reader to choose whether the missing knife would have been accompaniment or instrument.
Krom excludes a member from a stated set; sen says that someone or something is absent from an event or whole.
Ĉiuj krom Ana ĉeestis la kunvenon, kaj ni devis komenci sen ŝi.
Everyone except Ana attended the meeting, and we had to begin without her.
The first phrase subtracts Ana from “everyone.” The second describes the meeting as lacking her presence.
The vague preposition je cannot replace the precise absence relation, and bare accusative cannot replace sen.
Manner: doing something without a feature or accompanying act
A sen phrase often describes how an action happens.
La infano aŭskultis la tutan rakonton sen interrompo.
The child listened to the entire story without interruption.
Ŝi respondis sen kolero, kvankam la demando estis malĝentila.
She answered without anger, although the question was rude.
La ŝoforo preterpasis nin sen averto kaj tuj bremsis.
The driver passed us without warning and immediately braked.
The absence can characterize either a participant (virino sen familio) or an event (respondi sen kolero). Position usually makes the attachment clear; when it does not, rewrite rather than relying on English-like ambiguity.
Sen + infinitive: modern common usage
English “without doing” normally corresponds to sen + infinitive.
Ŝi foriris sen diri eĉ unu vorton.
She left without saying a single word.
Mi ne povas kontroli la dosieron sen unue elŝuti ĝin.
I cannot check the file without downloading it first.
Li legis la mesaĝon dufoje sen kompreni, kial ŝi koleras.
He read the message twice without understanding why she was angry.
This construction has a special normative history. Traditional analysis treated prepositions before infinitives with suspicion, and Zamenhof explicitly criticized sen + infinitive—yet he also used it. It has since become frequent, logical, and easily understood. In contemporary neutral Esperanto, sen diri, sen rigardi, and similar forms are accepted and practical.
The understood subject of the infinitive is normally the subject of the main clause. In Ŝi foriris sen diri, she both left and did not speak.
Alternative forms: noun and negative participle
Writers who prefer a more traditional structure can use an action noun or a negative adverbial participle.
| Form | Example | Typical effect |
|---|---|---|
| sen + infinitive | sen respondi | direct and now common |
| sen + action noun | sen respondo | absence of a response as a thing/result |
| ne + adverbial participle | ne respondante | simultaneous non-action, often more written |
Li forlasis la kunvenon sen respondi.
He left the meeting without replying.
Li forlasis la kunvenon ne respondante al la demando.
He left the meeting without answering the question.
The first simply excludes a reply from the event sequence. The second more explicitly depicts the non-answering as a simultaneous circumstance. An action noun is not always equivalent: sen respondo may mean that no answer existed, not necessarily that the subject deliberately failed to answer.
A different subject: sen tio, ke ...
Use sen tio, ke when a whole finite proposition is absent, especially when it has its own subject.
Li eniris la ĉambron sen tio, ke iu rimarkis lin.
He entered the room without anyone noticing him.
La prezo ŝanĝiĝis sen tio, ke la firmao avertis siajn klientojn.
The price changed without the company warning its customers.
Bare sen ke occurs, but neutral standard Esperanto normally inserts helper tio. A lighter alternative is often available: Li eniris nerimarkite “He entered unnoticed.”
Do not force sen + infinitive when it creates the wrong controller:
La pordo malfermiĝis sen tio, ke iu tuŝis ĝin.
The door opened without anyone touching it.
La pordo malfermiĝis sen tuŝi ĝin would grammatically invite “the door” as the understood subject of tuŝi, producing an absurd reading.
Negative scope: sen, ne sen, and litotes
Sen is negative in meaning but is not the clause-negator ne. Combining them can reverse the practical interpretation.
Li venis sen mono kaj devis piediri hejmen.
He came without money and had to walk home.
Li ne venis sen mono; li kunportis sufiĉe por ĉiuj.
He did not come without money; he brought enough for everyone.
The second sentence denies the absence of money, so it implies that he had some. This “not without” pattern is called litotes and often suggests a restrained positive claim.
Ne sen kialo la najbaroj plendis pri la bruo.
Not without reason, the neighbors complained about the noise.
This means that they did have a reason. Avoid piling negative correlatives onto sen unless that exact scope is intended. A positive indefinite such as ia or iu ajn is often clearer inside a sen phrase: sen ia klarigo, sen iu ajn helpo.
For broader scope patterns, see constituent negation.
Compounds and derived verbs
Sen- productively forms descriptions whose base is absent:
| Word | Underlying phrase | Meaning |
|---|---|---|
| senpaga | sen pago | free of charge |
| senfina | sen fino | endless |
| senutila | sen utilo | useless |
| senmova | sen movo | motionless |
| senkulpa | sen kulpo | innocent |
La muzeo estas senpaga dimanĉe, sed necesas rezervi horon.
The museum is free on Sundays, but it is necessary to reserve a time.
Senigi means “deprive/remove something from someone,” and seniĝi means “rid oneself/become free of something.” In the clearest modern frame, the removed element is introduced by je:
La nova regulo senigis la vilaĝon je grava enspezofonto.
The new rule deprived the village of an important source of income.
Post la translokiĝo ni seniĝis je multaj neuzataj mebloj.
After the move, we got rid of many unused pieces of furniture.
These lexical verb frames should be learned as wholes; they do not take a following sen phrase.
Norm and register
Nominal sen is foundational and neutral. Sen + infinitive was traditionally disputed but is now common and accepted in contemporary use. Sen tio, ke is the conservative clear option for a finite clause or different subject. Productive sen- compounds are neutral, though individual lexical items vary by context.
Common Mistakes
Adding -n after sen
❌ Li vojaĝis sen sian pasporton.
Incorrect — sen already marks the absence relation.
✅ Li vojaĝis sen sia pasporto.
He traveled without his passport.
Copying the English gerund after “without”
❌ Ŝi foriris sen dirante adiaŭ.
Incorrect — after sen, use the infinitive rather than an English-style gerund equivalent.
✅ Ŝi foriris sen diri adiaŭ.
She left without saying goodbye.
Giving a sen-infinitive the wrong subject
❌ La fenestro rompiĝis sen bati ĝin.
Incorrect intended meaning — this suggests that the window did not hit itself.
✅ La fenestro rompiĝis sen tio, ke iu batis ĝin.
The window broke without anyone hitting it.
Omitting tio before a finite clause
❌ Ŝi ŝanĝis la planon sen ke ni sciis pri tio.
Nonstandard as the clear neutral form — insert tio before the ke clause.
✅ Ŝi ŝanĝis la planon sen tio, ke ni sciis pri tio.
She changed the plan without our knowing about it.
Accidentally reversing the meaning with ne sen
❌ Mi alvenis ne sen bileto.
Wrong for ‘without a ticket’ — ne sen implies that a ticket was present.
✅ Mi alvenis sen bileto.
I arrived without a ticket.
Key Takeaways
Use sen + unmarked complement for something absent. It contrasts primarily with kun, and sometimes with instrumental per. Contemporary sen + infinitive is normal when both actions share a subject; use sen tio, ke for a finite clause or different subject. Remember that ne sen denies an absence and therefore creates a positive implication.
Now practice Esperanto
Reading grammar gets you part of the way. The exercises are where it sticks — free, no signup needed.
Start learning Esperanto →Related Topics
- KunB1 — Use kun for accompaniment and associated circumstances, while distinguishing companions from instruments, topics, and opponents.
- PerB1 — Use per for an instrument, means, method, channel, or intermediary through which an action is carried out.
- KromB1 — Use krom to set one item apart, then read polarity and ankaŭ to distinguish exception from addition.
- Infinitives after PrepositionsA2 — Choose the established preposition-plus-infinitive patterns and replace disfavored combinations with clauses, participles, or action nouns.
- Constituent NegationA1 — How placing ne before a phrase negates one participant, time, manner, or degree while leaving the rest of the clause asserted.
- Negative ConcordA2 — Understand when one negative expression negates an Esperanto clause, when two negatives reverse each other, and when repetition merely intensifies.