La membreco estas senpaga.

La is the definite article, meaning the. In this sentence, it points to a specific membership that has already been identified by the context, such as the membership of an organization, club, or service.

So:

• la membreco = the membership
• membreco = membership in a more general or abstract sense

Esperanto uses la a lot like English uses the, though sometimes Esperanto may include it where English would leave it out more naturally.

Membreco means membership.

It is built from:

• membro = member
• -ec- = the quality, state, or condition of something
• -o = noun ending

So:

• membro = a member
• membreco = the state or condition of being a member, i.e. membership

This suffix -ec- is very common in Esperanto:

• bona = good → boneco = goodness
• juna = young → juneco = youth
• libera = free → libereco = freedom

Estas is the present tense of esti, which means to be.

So:

• mi estas = I am
• ĝi estas = it is
• la membreco estas senpaga = the membership is free

Esperanto verbs do not change for person or number, so estas is always the same:

• I am = mi estas
• you are = vi estas
• they are = ili estas

Because senpaga is an adjective.

In Esperanto:

• nouns end in -o
• adjectives end in -a
• adverbs end in -e

Here, senpaga describes la membreco, so it must be an adjective.

Even though it comes after estas, it still agrees with the noun it describes:

• La membreco estas senpaga.
• La libro estas interesa.
• La ĉambro estas granda.

This is called a predicate adjective in English grammar, but in Esperanto it still takes the normal adjective ending -a.

Literally, senpaga means without payment.

It is made from:

• sen = without
• pagi = to pay
• paga = paid / payable / involving payment
• senpaga = without payment, free of charge

So senpaga usually means free in the sense of costing nothing, not free in the sense of liberty or freedom.

That distinction matters:

• senpaga = free of charge
• libera = free, not restricted
• libereco = freedom

Usually, no.

Libera means free in the sense of unrestricted, not controlled, or at liberty. It does not normally mean free of charge.

So:

• La membreco estas senpaga. = The membership is free.
• libera would sound like the membership is somehow unrestricted or unconstrained, not that it costs nothing.

For price, senpaga is the natural choice.

In Esperanto, prefixes are often attached directly to the word they modify.

Here:

• sen- = without
• paga = paid / requiring payment
• senpaga = without payment

This is very normal in Esperanto word-building. Similar examples:

• senviva = lifeless
• sendanĝera = harmless
• senkora = heartless

Esperanto often prefers compact, built-up words like this.

Because there is no direct object here.

The sentence structure is:

• La membreco = subject
• estas = verb
• senpaga = predicate adjective

The accusative -n is usually used for a direct object, and there is none in this sentence.

So:

• La membreco estas senpaga. = correct

If membreco were an object, then it might take -n, but not here.

Yes. In Esperanto, adjectives agree with the nouns they describe in number, and also in case if needed.

Singular:

• La membreco estas senpaga.

Plural example:

• La membrecoj estas senpagaj. = The memberships are free.

Here:

• membrecoj ends in -j for plural
• senpagaj also ends in -j to match

That agreement happens even when the adjective comes after estas.

The most natural order is:

• La membreco estas senpaga.

That is the standard subject + verb + complement order.

Esperanto word order is fairly flexible, but this version is the most neutral and normal. Because endings show grammar clearly, you can move things around for emphasis more easily than in English, but learners should generally stick to the standard order unless they have a reason not to.

A simple pronunciation guide is:

la mem-BRE-tso ES-tas sen-PA-ga

A few useful points:

• c is pronounced like ts
• g is always hard, as in go
• stress is usually on the second-to-last syllable

So:

• membreco → mem-BRE-co
• senpaga → sen-PA-ga

That regular stress pattern is one of the nice features of Esperanto.