La nombro de paneoj kreskas.

In this sentence, the thing that is increasing is the number, not the breakdowns themselves.

• la nombro = the number
• de paneoj = of breakdowns

So the structure is:

[La nombro] [de paneoj] [kreskas].

That means the number of breakdowns is increasing.

If you said Paneoj kreskas, that would mean Breakdowns are increasing/growing, which is possible in some contexts, but it focuses more directly on the breakdowns themselves rather than on their number.

This is a very common question.

After nombro, Esperanto normally uses de, not da:

• la nombro de paneoj = the number of breakdowns

Why? Because nombro is a noun meaning number, and de shows possession/association: the number of X.

Da is used mainly for quantities, amounts, and measures, especially when the quantity word is the main idea:

• multe da akvo = a lot of water
• du kilogramoj da pomoj = two kilograms of apples
• kelkaj paneoj = several breakdowns

But with nombro, standard Esperanto uses de:

• la nombro de homoj
• granda nombro de libroj
• la nombro de paneoj

The ending -j marks the plural in Esperanto.

• paneo = one breakdown / one failure
• paneoj = breakdowns / failures

Since the sentence talks about more than one breakdown, the plural is needed.

Because there is no direct object here.

Esperanto uses -n for the direct object, and sometimes for direction.

In this sentence:

• la nombro de paneoj is the subject
• kreskas is the verb

So the sentence is just: The number of breakdowns increases / is increasing.

Nothing is being acted on directly, so no accusative -n is needed.

Because the verb agrees with the real subject, which is la nombro, and nombro is singular.

Esperanto verbs do not change for singular or plural the way English verbs sometimes do, but the important point is grammatical structure: the subject is the number, not the breakdowns.

Compare:

• La nombro de paneoj kreskas.
  = The number of breakdowns is increasing.

• La paneoj kreskas.
  = The breakdowns are increasing.

In the first sentence, paneoj is only part of the phrase de paneoj.

Kreski literally means to grow or to increase.

So kreskas can mean:

• grows
• is growing
• increases
• is increasing

In this sentence, the most natural English translation is usually:

• The number of breakdowns is increasing.

Even though the basic verb is related to grow, Esperanto uses it naturally for numbers, prices, rates, and similar things that go up.

Both can work, but they are slightly different in feel.

• kreskas = grows, increases
• pliiĝas = becomes greater, increases

In many contexts, they are very close in meaning.

La nombro de paneoj kreskas is a very natural sentence.
La nombro de paneoj pliiĝas would also be understandable and natural.

A learner should mainly know that kreski is a normal and common verb for something increasing.

La is the definite article, meaning the.

So:

• la nombro = the number
• nombro = a number / number

Using la makes the phrase more definite and specific. It suggests that we are talking about a particular number that is relevant in the situation.

In some contexts, Esperanto can omit la more often than English would, but here La nombro de paneoj kreskas is a very natural way to say The number of breakdowns is increasing.

Yes, it is possible, but it changes the feel.

• La nombro de paneoj kreskas = the number of breakdowns is increasing
• Nombro de paneoj kreskas = a number of breakdowns is increasing / number of breakdowns is increasing

Without la, the phrase sounds less definite and often less natural in ordinary usage. In most cases, if English would say the number, Esperanto will also usually use la nombro.

De usually means of, from, or shows a relationship between nouns.

Here it links nombro and paneoj:

• nombro de paneoj = number of breakdowns

So de paneoj tells you what is being counted.

You can think of it as answering the question: The number of what?
Answer: of breakdowns.

Yes. Esperanto nouns end in -o.

So:

• paneo = a noun
• paneoj = plural noun

The root here is pane-, and the noun ending is -o. Then plural -j is added:

pane- + o + j = paneoj

This is a very regular part of Esperanto grammar.

The word order is:

Subject + verb

with a de-phrase inside the subject:

• La nombro de paneoj = subject
• kreskas = verb

So the full structure is:

[La nombro de paneoj] [kreskas].

This is straightforward and very similar to English: The number of breakdowns increases / is increasing.

Yes, Esperanto word order is fairly flexible, as long as the meaning stays clear.

For example, you could say:

• Kreskas la nombro de paneoj.

This can sound a little more literary or emphatic, like: Increasing is the number of breakdowns or more naturally The number of breakdowns is increasing.

But the most neutral and simple version is:

• La nombro de paneoj kreskas.

Because de-phrases in Esperanto normally modify another word rather than act as the main subject by themselves.

Here:

• nombro is the main noun
• de paneoj depends on nombro

So de paneoj is like an attached description: the number — of breakdowns

The core subject is still la nombro.

A good test is this: What is doing the action kreskas?

Answer: la nombro.

That shows it is the subject.