Ies: The Indefinite Possessor Correlative

Ies means “someone’s” or “belonging to some unidentified person.” It combines indefinite i- with possessor ending -es. Its grammar is compact but not identical to an English apostrophe possessive: ies is an invariant determiner, normally precedes what is possessed, and makes that noun phrase definite.

Indefinite possessor in the table

Esperanto’s 45 table words form a five-by-nine grid. The beginning selects a referential force, and the ending selects a semantic domain:

The -es row is kies “whose,” ties “that person’s,” ies “someone’s,” ĉies “everyone’s,” and nenies “no one’s.” The row is closed: ies is not formed by attaching English-like possessive material to iu. The table-word system shows all five columns and nine rows together.

In both examples, the possessed object is identifiable—the particular phone that is ringing, the particular wallet that was found—but its owner is not. This combination of a definite possession and an indefinite possessor is the core of ies.

A determiner, not an agreeing adjective

Like possessive pronouns and the other -es table words, ies is a determiner. It normally stands before the possessed noun and replaces la. A postposed de phrase expresses the same basic relation with different word order.

The first is compact and leaves the person wholly unidentified. The second gives the possessor a noun, gasto, and may therefore be more informative. Notice ies jako, but la jako de iu gasto: ies itself supplies definiteness, whereas the postposed de phrase normally accompanies la on the possessed noun.

Because ies is already a determiner, neutral standard Esperanto does not say la ies jako. Nor does it combine directly with another determiner such as mia. If two possessive relations must be expressed, restructure the phrase.

The negative and interrogative contexts do not change ies into nenies or kies automatically. Mi ne volas preni ies lokon negates the taking, while still describing a place belonging to somebody. Ĉu … ies …? asks whether an unidentified possessor exists; Kies biciklo ĝi estas? would directly ask the possessor’s identity.

Usually one unidentified person

PMEG records an important usage tendency: ies is normally used for one unknown person, not for an unknown object and not for several possessors. This is not visible from English “someone’s,” so it deserves explicit attention.

The standalone use ĝi estas ies is possible because the possessed item is supplied by the context: “it is someone’s [property].” Before a noun, ies adreson identifies the address while withholding or lacking the owner’s identity.

If the possessor must be characterized or is clearly nonhuman, a fuller de phrase is usually clearer:

Use de iu birdo, not automatically ies, because the possessor is an animal explicitly characterized by a noun. Use de iuj komitatanoj because the possessors are plural. The table word ies itself cannot show that plurality.

Invariant despite the grammar of the possession

All -es table words reject both plural -j and accusative -n. Number and case belong to the possessed noun and its agreeing adjectives, never to ies.

In the first example, novajn ŝlosilojn is plural and accusative; ies remains unchanged. In the second, ies can be understood as marking the semantic subject of the action noun rido: some unidentified person did the laughing. The -es relation is therefore broader than legal ownership, just like English possessives in “someone’s arrival” or “someone’s opinion.”

Possession, authorship, and semantic roles

The possessor ending covers relations often paraphrased with de. Depending on the noun, ies may identify an owner, creator, experiencer, or participant.

With laboro, the person may be the creator; with opinio, the person is the thinker or holder. Context supplies the precise relationship. If ambiguity matters, spell it out: la laboro farita de iu “the work done by someone” or la laboro por iu “the work for someone.” Ies does not encode every possible English of relation.

Ies, kies, ties, and de iu

The initial element tracks information status:

Kies requests or relativizes the possessor, ies leaves it unidentified, and ties points to a contextually identified possessor. In the last example, ties points to the nonsubject Nora and avoids suggesting that the suitcase belongs to Petro. De iu overlaps with ies but can carry complements and modifiers: la pluvombrelo de iu nova lernanto. Choose the table word when the compact possessor relation is all you need; choose the full phrase when you need to describe the possessor.

Norm, variation, and usage

The determiner status of -es words, their pre-noun position, their definite effect, and their inability to take -j/-n are standard rules. The tendency to reserve ies for one unidentified person is also documented in PMEG and reflected in established literary and modern usage.

Speakers may sometimes extend ies where context makes a nonhuman or collective possessor understandable, but the clearest general recommendation is ies for one unspecified person and de iu/iuj + noun when number or kind must be explicit. This is accepted communicative precision, not an attempt to fill a missing inflection on ies.

Common Mistakes

Adding the definite article

Giving ies accusative agreement

Pluralizing the possessor word

Building an English-style hybrid

Using ies when plural possessors matter

Key Takeaways

• i- means unspecified; -es marks a possessor or related “of” role.
• Ies is a definite determiner: use ies libro, not la ies libro.
• It normally refers to one unidentified person.
• It never takes -j or -n; inflect the possessed noun phrase instead.
• Use de iu/iuj + noun when the possessor needs a description or explicit number.