Kapelusz pszczelarski i kombinezon pszczelarski są gotowe.

Because the sentence has a compound subject: kapelusz ... i kombinezon ... = the hat and the suit.

In Polish, just like in English, two singular nouns joined by i (and) usually make the whole subject plural, so the verb must also be plural:

• Kapelusz jest gotowy. = The hat is ready.
• Kombinezon jest gotowy. = The suit is ready.
• Kapelusz i kombinezon są gotowe. = The hat and the suit are ready.

So są is the normal plural form of być (to be) here.

This is a very common Polish question. In the plural, Polish distinguishes:

• masculine personal groups → gotowi
• non-masculine-personal groups → gotowe

Masculine personal is used mainly for groups of male people (or mixed groups of people in many contexts).
But kapelusz and kombinezon are things, not people, so Polish uses the non-masculine-personal plural:

• Oni są gotowi. = They (men / people) are ready.
• One są gotowe. = They (things / non-masculine-personal nouns) are ready.

So:

• Kapelusz i kombinezon są gotowe. is correct.

Even though both nouns are grammatically masculine in the singular, they are not masculine personal, so the plural adjective is gotowe.

Because each pszczelarski agrees with a single noun:

• kapelusz pszczelarski
• kombinezon pszczelarski

Both kapelusz and kombinezon are:

• singular
• masculine
• nominative here

So the adjective must also be:

• singular
• masculine
• nominative

That is why you get pszczelarski in both places.

In this sentence, repeating it is the clearest and most natural way to show that both items are beekeeping items:

• Kapelusz pszczelarski i kombinezon pszczelarski są gotowe.

If you say:

• Kapelusz i kombinezon pszczelarski są gotowe

it may sound as if only kombinezon is clearly being described as pszczelarski, while kapelusz is less directly connected to that adjective. So repeating the adjective removes ambiguity.

In other words, the repeated adjective makes it explicit that you mean:

• beekeeping hat
• beekeeping suit

You are right that in Polish adjectives often come before the noun:

• duży dom = a big house

But with some classifying, technical, or fixed-name expressions, the adjective can appear after the noun.
Expressions like kombinezon pszczelarski sound like the name of a type/category of item: a beekeeping suit.

So:

• kombinezon pszczelarski
• kapelusz pszczelarski

can sound quite natural as item names or product-type labels.

If you moved the adjective before the noun, Polish speakers could still understand it, but the feel may change slightly, sometimes sounding more descriptive and less like a standard item name.

They are in the nominative, because they are the subject of the sentence.

• kapelusz — nominative singular
• pszczelarski — nominative singular masculine
• kombinezon — nominative singular
• pszczelarski — nominative singular masculine

The predicate adjective gotowe is also in the nominative plural, agreeing with the plural subject.

So this is a straightforward nominative sentence: X and Y are ready.

Because Polish has no articles.

English says:

• a hat
• the hat

Polish usually just says:

• kapelusz

The exact meaning depends on context. So Kapelusz pszczelarski i kombinezon pszczelarski są gotowe could mean, depending on the situation:

• The beekeeping hat and the beekeeping suit are ready
• A beekeeping hat and a beekeeping suit are ready

Context tells you which one is meant.

No. They are related, but they do not mean the same thing.

• pszczelarski = beekeeping / apiarist / related to beekeeping
• pszczeli = bee / of bees

So for equipment used in beekeeping, pszczelarski is the right choice:

• kapelusz pszczelarski = beekeeping hat
• kombinezon pszczelarski = beekeeping suit

But pszczeli would be used in expressions more directly connected with bees themselves, for example things like bee venom or bee products.

So a learner should think of pszczelarski as for beekeeping, not simply bee-.

In a normal full sentence, you would usually keep są:

• Kapelusz pszczelarski i kombinezon pszczelarski są gotowe.

If you omit it:

• Kapelusz pszczelarski i kombinezon pszczelarski gotowe.

that sounds incomplete in standard neutral Polish, though in very informal notes, labels, checklists, or headline-like language, Polish sometimes drops words more freely.

So for a learner, the safest rule is:

• in normal statements, keep są

Yes, Polish word order is more flexible than English, because endings show grammatical relationships. But not every order sounds equally natural.

The most neutral order here is:

• Kapelusz pszczelarski i kombinezon pszczelarski są gotowe.

You could also change the order for emphasis, for example putting gotowe earlier to stress that they are ready. But for everyday learning, the original order is the best one to copy.

So the short answer is:

• yes, word order can change
• but the version you have is the most neutral and natural for general use

This is one of the trickiest-looking words for English speakers.

A rough guide is:

• pszczelarski ≈ psh-che-LAR-skee

The beginning pszcz- is a consonant cluster that English does not really have. You do not need to make it perfect right away. The main thing is to avoid inserting too many extra vowels.

A very rough breakdown:

• pszcze- sounds something like pshche-
• -larski sounds like LAR-skee

So the whole word is approximately:

• pshche-LAR-skee

Not perfect, but close enough for a learner’s first step.

You would make both the verb and gotowy/gotowa/gotowe agree with that single noun.

For example:

• Kapelusz pszczelarski jest gotowy. = The beekeeping hat is ready.
• Kombinezon pszczelarski jest gotowy. = The beekeeping suit is ready.

Here:

• jest = singular is
• gotowy = singular masculine ready

Since both kapelusz and kombinezon are masculine singular nouns, gotowy is the correct singular form for each.