La kompoŝto estas organika.

La is the definite article, meaning the.

So La kompoŝto estas organika most naturally means The compost is organic, referring to a specific compost pile or batch of compost.

If you mean compost in general, Esperanto often allows you to leave out the article:

• Kompoŝto estas organika. = Compost is organic.

Esperanto has no indefinite article, so there is no separate word for a/an.

In Esperanto, nouns normally end in -o.

So:

• kompoŝto = compost
• the -o tells you it is a noun

This is one of the most basic and helpful patterns in Esperanto: the ending shows the word’s grammatical role.

Words ending in -a are adjectives in Esperanto.

So:

• organika = organic

The -a shows that the word describes a noun. Here, organika describes kompoŝto.

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

Here both words are singular and not accusative, so the basic forms are used:

• kompoŝto
• organika

If the noun were plural, the adjective would also become plural:

• La kompoŝtoj estas organikaj. = The composts are organic.

This agreement is very regular in Esperanto.

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

So here:

• estas = is / are / am

Unlike English, Esperanto verbs do not change depending on the subject:

• mi estas = I am
• vi estas = you are
• li estas = he is
• la kompoŝto estas = the compost is

That makes Esperanto verbs much simpler than English verbs.

The -n ending usually marks a direct object.

But in this sentence, there is no direct object. The sentence uses esti (to be), which links the subject to a description:

• La kompoŝto = subject
• estas = linking verb
• organika = predicate adjective

After esti, you normally do not use -n on the adjective.

So:

• La kompoŝto estas organika. is correct
• La kompoŝto estas organikan. is not correct

A good approximate pronunciation is kom-POSH-to.

A few helpful points:

• o is like the vowel in for, but pure and short
• ŝ is pronounced like English sh
• every letter is pronounced
• the stress falls on the second-to-last syllable

So kompoŝto has three syllables:

• kom-poŝ-to

and the stress is on poŝ.

Ŝ is an Esperanto letter pronounced like English sh.

So:

• ŝ = sh

That means kompoŝto sounds like komposhto, not komposto with a plain s sound.

Esperanto uses special letters like ĉ, ĝ, ĥ, ĵ, ŝ, ŭ so that spelling and pronunciation stay very regular.

Esperanto stress is very regular: it always falls on the second-to-last syllable.

So:

• or-ga-ni-ka

The stress is on ni:

• or-ga-NI-ka

This fixed stress rule is true for almost all Esperanto words.

The normal, neutral order is:

• La kompoŝto estas organika.

That is the most natural way to say it.

Esperanto word order is somewhat flexible, but changing it usually adds emphasis or sounds more literary or marked. For a beginner, it is best to keep the standard order:

• subject + verb + complement

So this sentence is a very typical pattern:

• La kompoŝto = subject
• estas = verb
• organika = description

Usually, yes, but the exact nuance depends on context.

It can refer to something:

• made from living matter
• natural / biological in composition
• sometimes, in the right context, related to organic farming or gardening

In this sentence, the basic idea is simply that the compost is organic in nature or composition. The exact shade of meaning comes from context, just as it does in English.