Pojazd jest gotowy.

Because gotowy has to agree with pojazd.

Pojazd is a masculine singular noun, so the adjective also takes the masculine singular form:

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

So:

• Pojazd jest gotowy. = The vehicle is ready.
• Maszyna jest gotowa. = The machine is ready.
• Auto jest gotowe. = The car is ready. (because *auto is neuter in Polish)*

Yes. Pojazd is a masculine inanimate noun.

You can tell from the dictionary form and from the agreement:

• ten pojazd = this vehicle
• gotowy pojazd = a ready vehicle

Because it is masculine singular, the sentence uses jest gotowy.

Not exactly. Pojazd means vehicle, and it is quite a general and somewhat formal/technical word.

It can refer to things like:

• a car
• a truck
• a bus
• a motorcycle
• other kinds of transport vehicles

If you specifically mean car, Polish usually uses:

• samochód = car
• auto = car

So Pojazd jest gotowy sounds more like The vehicle is ready than The car is ready.

Jest is the 3rd person singular present tense of być = to be.

So:

• pojazd = vehicle
• jest = is
• gotowy = ready

Together: Pojazd jest gotowy. = The vehicle is ready.

In a normal full sentence, no—you should keep jest.

• standard: Pojazd jest gotowy.

If you say just:

• Pojazd gotowy

it can sound like a label, status message, headline, or some kind of short operational note, not a normal neutral sentence.

So for learners, the safest choice is: Pojazd jest gotowy.

Pojazd is in the nominative case because it is the subject of the sentence.

The sentence structure is:

• Pojazd = subject
• jest = verb
• gotowy = predicative adjective

The adjective gotowy also appears in the nominative form because it agrees with the subject.

Because Polish does not use articles like English a and the.

So pojazd can mean:

• a vehicle
• the vehicle

The exact meaning depends on context.

That means:

• Pojazd jest gotowy.

could mean either:

• A vehicle is ready.
• The vehicle is ready.

Context tells you which one is intended.

Yes, you could, because Polish word order is more flexible than English. But the emphasis changes.

• Pojazd jest gotowy. = neutral, standard word order
• Gotowy jest pojazd. = marked/emphatic, something like It is the vehicle that is ready
• Jest gotowy pojazd. = possible in some contexts, but less neutral

For learners, the most natural basic order is: Pojazd jest gotowy.

A rough English-friendly guide would be:

• pojazd ≈ PO-yazd
• jest ≈ yest
• gotowy ≈ go-TO-vih

A few helpful notes:

• Polish j sounds like English y
• Polish w sounds like English v
• stress is usually on the second-to-last syllable
  • PO-jazd
  • go-TO-wy

So the whole sentence is roughly: PO-yazd yest go-TO-vih

Yes, it is grammatical and natural, but it sounds a bit formal, technical, or official because of pojazd.

In everyday conversation, people often use a more specific word, for example:

• Samochód jest gotowy. = The car is ready.
• Auto jest gotowe. = The car is ready.

So Pojazd jest gotowy is perfectly correct, but it may sound like something from:

• transport
• logistics
• repair/service
• military or official communication

Sometimes, yes, but the meaning may change slightly.

• gotowy = ready
• przygotowany = prepared

Compare:

• Pojazd jest gotowy. = The vehicle is ready.
• Pojazd jest przygotowany. = The vehicle is prepared.

Gotowy is the most direct equivalent of ready here.
Przygotowany suggests that some preparation has been done.

The plural would be:

• Pojazdy są gotowe. = The vehicles are ready.

Changes:

• pojazd → pojazdy = vehicle → vehicles
• jest → są = is → are
• gotowy → gotowe = ready (plural, for non-masculine-personal nouns)

Since pojazdy are things, not people, Polish uses gotowe, not gotowi.