Odwołanie jest gotowe.

Because odwołanie is a neuter singular noun.

In Polish, adjectives must agree with the noun they describe in:

• gender
• number
• usually case

Here the noun is:

• odwołanie = neuter singular

So the adjective must also be neuter singular:

• masculine: gotowy
• feminine: gotowa
• neuter: gotowe

So Odwołanie jest gotowe is grammatically matched.

Odwołanie is a noun. More specifically, it is:

• singular
• neuter
• in the nominative case here, because it is the subject of the sentence

A useful clue is the ending -e, which often appears in neuter nouns, though not every noun ending works the same way.

This sentence has a very basic structure:

• odwołanie = subject
• jest = is
• gotowe = predicate adjective, agreeing with the subject

It is in the nominative case.

That is because odwołanie is the subject of the sentence: it is the thing that is ready.

In a sentence with być (to be) plus an adjective, the subject stays in the nominative:

• Odwołanie jest gotowe.

The adjective gotowe also appears in the nominative to match the subject.

Jest is the 3rd person singular present tense of być (to be), so it means is.

So the structure is exactly like:

• X jest gotowe = X is ready

In normal standard Polish, jest is correct and natural here.

Sometimes in very informal notes, headlines, or shorthand, Polish may omit forms of to be, for example:

• Odwołanie gotowe

But that sounds more like a label, note, or compressed style. For a full normal sentence, Odwołanie jest gotowe is the best form.

Because Polish does not have articles.

English distinguishes:

• an appeal
• the appeal

Polish usually just says:

• odwołanie

The exact meaning depends on context.

So Odwołanie jest gotowe could mean:

• The appeal is ready
• An appeal is ready
• The cancellation is ready
• and so on, depending on the situation and the meaning already provided in context

Yes. Polish word order is more flexible than English, although Odwołanie jest gotowe is the most neutral order.

Possible alternatives include:

• Gotowe jest odwołanie.
• Jest gotowe odwołanie.
  This one is much less neutral and depends strongly on context.

Changing the order usually changes emphasis, not the basic meaning.

The standard, most natural learner-friendly version is:

• Odwołanie jest gotowe.

It can cover both ideas, depending on context.

Gotowy / gotowa / gotowe often means:

• ready
• prepared
• finished and ready for use
• available for the next step

So in context, jest gotowe could suggest:

• it has been prepared
• it has been completed
• it is ready to be submitted / used / sent

Polish often leaves that nuance to context, just as English sometimes does with ready.

No. Odwołanie can have different meanings depending on context.

Common meanings include things like:

• appeal (for example, a legal or administrative appeal)
• cancellation
• calling off
• sometimes other related meanings depending on the situation

So although the learner already knows the intended meaning in this sentence, it is useful to remember that odwołanie is a context-dependent noun.

That is very common in Polish vocabulary: one form may correspond to several English words.

A rough pronunciation guide for an English speaker is:

• Odwołanie ≈ od-vwah-LAH-nyeh
• jest ≈ yest
• gotowe ≈ go-TO-veh

A few key points:

• w in Polish sounds like English v
• ł sounds like English w
• ie at the end of -nie is pronounced roughly nyeh
• j sounds like English y
• e is usually a clear eh, not a reduced schwa

The natural stress is usually on the second-to-last syllable:

• odwoŁAnie
• goTOwe

Yes, but it changes the style.

• Odwołanie jest gotowe = full, normal sentence
• Odwołanie gotowe = shortened style, like a note, checklist item, status update, or headline

So if you are learning standard Polish sentence building, use:

• Odwołanie jest gotowe

If you later see Odwołanie gotowe, do not be surprised; it is understandable, just less complete in form.