Klient potrzebuje wsparcia.

Klient is in the nominative singular, because it is the subject of the sentence.

In other words:

• klient = the one doing or being described by the verb
• potrzebuje = needs

So klient stays in the basic subject form.

Potrzebuje is the 3rd person singular present tense form of potrzebować.

So it means:

• I need = potrzebuję
• you need = potrzebujesz
• he/she/it needs = potrzebuje

With klient, we use potrzebuje because klient is singular.

Because potrzebować normally takes the genitive case, not the nominative/accusative basic form.

The dictionary form is:

• wsparcie

But after potrzebować, it becomes:

• wsparcia

So:

• potrzebować wsparcia = to need support

This is a very important pattern in Polish:

• potrzebuję czasu = I need time
• potrzebujesz pomocy = you need help
• klient potrzebuje wsparcia = the client needs support

Here it is singular: it is the genitive singular of wsparcie.

That can be confusing, because wsparcia can also be a plural form in other contexts. But in this sentence, the verb potrzebować tells you it should be understood as genitive singular.

So here:

• wsparcie = basic form
• wsparcia = of support / support after potrzebować

Polish does not have articles like English the and a/an.

So klient can mean:

• the client
• a client

The exact meaning depends on the context. In many sentences, Polish simply leaves that unstated.

Yes. Polish word order is more flexible than English because the case endings help show what each word is doing.

The most neutral order here is:

• Klient potrzebuje wsparcia.

But you could also say:

• Wsparcia potrzebuje klient.

That version puts more emphasis on wsparcia or sounds more contrastive. For a learner, the original order is the safest and most natural default.

Yes, klient is a masculine noun.

If the client is a woman, you would usually say:

• klientka potrzebuje wsparcia

So:

• klient = male client / masculine form
• klientka = female client

A rough English-style pronunciation is:

KLYENT poh-tsheh-BOO-yeh FSPAR-cha

A few helpful details:

• klient sounds roughly like KLYENT
• rz in potrzebuje sounds like the zh sound in measure, but after t it becomes more like tsh
• w in Polish is usually like English v
• but in wsparcia, before the voiceless s, it is pronounced more like f
• cia in wsparcia sounds like a soft cha

So wsparcia starts roughly like fsp-, not like English w.

The dictionary form is wsparcie.

That is the form you would look up in a dictionary. In this sentence, it changes to wsparcia because of the verb potrzebować.

So:

• dictionary form: wsparcie
• form used here: wsparcia

Yes. Klient potrzebuje pomocy is also correct and very common.

The difference is roughly:

• pomoc / pomocy = help, assistance
• wsparcie / wsparcia = support

In many contexts they are similar, but wsparcie can sound a little broader or more formal, depending on the situation.

You would say:

Klient nie potrzebuje wsparcia.

That means The client does not need support.

Notice that wsparcia stays in the genitive. With potrzebować, you already expect the genitive, so negation does not change that part.