Esperanto participles can end in -o and become nouns naming a participant in an action. Vizitanto is someone who is visiting, vizitinto someone who visited earlier, and vizitonto someone who will visit. Passive forms reverse the viewpoint: invitito is someone who was invited.
This compact system combines three decisions: active or passive voice, time relative to the reference point, and noun grammar. Once built, the result behaves like any other noun: vizitanto, vizitantoj, vizitanton, vizitantojn.
For the full paradigm across adjective, adverb, and noun forms, see the six-participle system map.
The six-part system
The active participial suffixes name the semantic subject — normally the person who performs or experiences the action. The passive suffixes name the semantic object — normally the person affected by a transitive action.
| Voice and time | Form | Example | Core meaning |
|---|---|---|---|
| active, ongoing | -ant-o | skribanto | person writing |
| active, earlier | -int-o | skribinto | person who wrote |
| active, later | -ont-o | skribonto | person who will write |
| passive, ongoing | -at-o | juĝato | person being judged |
| passive, earlier/completed | -it-o | invitito | person who was invited |
| passive, later/intended | -ot-o | juĝoto | person who will be judged |
The structure is transparent: skrib-ant-o consists of the action root skrib- (“write”), active ongoing suffix -ant-, and noun ending -o. Adding -j or -n does not disturb that structure: skrib-ant-o-j-n.
La preleganto jam atendas apud la scenejo.
The speaker is already waiting beside the stage.
La gajninto dankis sian teamon post la matĉo.
The winner thanked their team after the match.
Ĉiu partoprenonto devas registriĝi antaŭ vendredo.
Everyone who is going to participate must register before Friday.
The three nouns look at the action from the doer's side. The speaker delivers the lecture, the winner won, and the future participant will participate.
Active and passive name opposite participants
With a transitive verb, changing voice can name the two sides of the same event. If Ana invites Bo, Ana is la invitanto and Bo is la invitito after the invitation has been made.
La intervjuanto faris mallongajn demandojn, kaj la intervjuito respondis trankvile.
The interviewer asked short questions, and the interviewee answered calmly.
La organizantoj bonvenigis ĉiujn invititojn ĉe la enirejo.
The organizers welcomed all the invited guests at the entrance.
La kuracisto parolis kun la operacioto antaŭ la operacio.
The doctor spoke with the person who was to be operated on before the operation.
Intervjuanto performs the interviewing; intervjuito has undergone it. Operacioto is passive and future relative to the conversation: the operation is still ahead.
Passive participles require a verb that can have an object. There is no normal passive venito meaning “a person who arrived,” because veni does not take a direct object. Use active veninto.
Relative time, not a calendar tense
The vowels a, i, o show ongoing, earlier, and later time relative to the situation being discussed. They do not independently mean present, past, and future on a calendar.
Jam vendrede la sabata prelegonto sendis al ni siajn lumbildojn.
As early as Friday, the person due to speak on Saturday sent us their slides.
Morgaŭ ni publikigos la nomojn de la gajnintoj.
Tomorrow we will publish the names of the people who won.
In the first sentence, prelegonto presents the lecture as later than the Friday sending event, although sendis places that event in the past. In the second, gajnintoj refers to winning that occurred before tomorrow's publication. This relative-time logic is one of Esperanto's most powerful participial features.
The distinction can be minimal:
La parolanto estas nun ĉe la mikrofono; la parolinto jam sidiĝis; la parolonto kontrolas siajn notojn.
The current speaker is at the microphone; the previous speaker has sat down; the next speaker is checking their notes.
All three people relate to the same act of speaking, but from different temporal positions.
Participial nouns take ordinary noun endings
A participial noun is grammatically an -o noun. Use -j for multiple participants and -n when it is a direct object. An agreeing adjective receives the same number and case endings.
Ni salutis la novajn partoprenantojn antaŭ la kunveno.
We greeted the new participants before the meeting.
La arestitoj ne rajtis telefoni tiun vesperon.
The detainees were not allowed to make a phone call that evening.
In la novajn partoprenantojn, both adjective and noun are plural accusative. In la arestitoj, the noun is a plural subject and therefore has -j but no -n.
These nouns are normally gender-neutral. Gajninto, lernanto, and invitito do not by themselves say whether the person is male, female, or nonbinary.
Established role words and time-neutral readings
Frequent participial nouns often become ordinary labels for roles. Lernanto means a learner or student, loĝanto an inhabitant, partoprenanto a participant, and prezidanto a president or chairperson. Their lexical role can be more important than a moment-by-moment time contrast.
La loĝantoj de la strato petis pli sekuran transirejon.
The residents of the street requested a safer crossing.
Ĉu la prezidanto ĉeestos la morgaŭan kunsidon?
Will the chairperson attend tomorrow's meeting?
— Ĉu ĉiuj invititoj jam alvenis? — Ne, du ankoraŭ estas en la trajno.
— Have all the invited guests arrived? — No, two are still on the train.
Calling someone lernanto does not claim that the person is literally studying at the instant of speech. Established usage treats the learning activity as their ongoing role. This is normal neutral Esperanto, not an exception that changes the suffix system.
A person is not an action or an object
An -o participle normally names a person who is the semantic subject or object of the action. It does not name the action itself. Skribanto is a writer/person writing; skribado is the activity of writing.
Nor should a simple passive participial noun normally be used for an ordinary nonpersonal thing. For a thing produced or affected by an action, Esperanto generally uses -aĵ- or a simpler lexical noun: skribaĵo (“a piece of writing”), trovaĵo (“a find”), kreaĵo (“a creation”). Nonpersonal -o participles do occur in specialized (academic) functions, especially mathematics—dividanto “divisor”—but that is an established technical extension, not the default pattern.
La verkisto montris al mi sian plej novan skribaĵon.
The writer showed me their newest piece of writing.
The person is verkisto; the written item is skribaĵo. A form such as skribito would normally be understood as a person who has been written about or otherwise acted on by the verb in a context that licenses that meaning, not simply “a written text.”
Common Mistakes
Choosing active when the person receives the action
❌ La invitantoj sidis ĉe la honora tablo.
Wrong for the intended meaning ‘the people who had been invited’; invitantoj are the people doing the inviting.
✅ La invititoj sidis ĉe la honora tablo.
The invited guests sat at the head table.
Treating -ant- as a general word for a past actor
❌ Li mensogis nur unufoje, sed pro tio ni nomis lin mensoganto.
Incorrect for the intended one-time past meaning: mensoganto presents a current or habitual liar.
✅ Li mensogis nur unufoje, do li estis mensoginto, ne kutima mensoganto.
He lied only once, so he was someone who had lied, not a habitual liar.
Adding an unnecessary person suffix
❌ Ĉiu partoprenantulo ricevos nomŝildon.
Incorrect: an O-participle already names the participant; -ul- is unnecessary here.
✅ Ĉiu partoprenanto ricevos nomŝildon.
Every participant will receive a name badge.
Forgetting plural and accusative endings
❌ Ni registris la nova partoprenantoj.
Incorrect: both adjective and noun are plural direct objects.
✅ Ni registris la novajn partoprenantojn.
We registered the new participants.
Using a person noun for an action
❌ La skribanto de la raporto daŭris tri horojn.
Incorrect for the intended action meaning: skribanto is a person.
✅ La skribado de la raporto daŭris tri horojn.
Writing the report took three hours.
Key Takeaways
- Active -ant-, -int-, -ont- names the doer or experiencer; passive -at-, -it-, -ot- names the affected participant.
- The time contrast is relative: ongoing, earlier, or later than the reference point.
- The final -o makes a noun, so ordinary -j and -n rules apply.
- O-participles normally name people; use -aĵ- or a lexical noun for ordinary nonpersonal products.
- Frequent role nouns such as lernanto and prezidanto can have established time-neutral meanings.
Related Topics
- The Six Participles: A System MapB1 — Map Esperanto's six participles by voice and relative time, then use them as adjectives, adverbs, nouns, and compound verb forms.
- Relative Time in ParticiplesC2 — Interpret participial time relative to the described situation, separating ongoing, completed, and prospective action from calendar tense.
- Participles with Plural and AccusativeB2 — Apply -j and -n to adjectival and nominal participles while keeping adverbial -e forms invariable.
- Lexicalized ParticiplesC2 — Recognize participles whose repeated use has developed conventional adjective, noun, title, and discourse meanings beyond one immediate event.
- Nominalizations and Event NounsA2 — How Esperanto turns action roots and clauses into nouns for events, processes, results, and countable occurrences.