Musimy się pozbyć problemu.

Musimy means we must / we have to. Its base form is musieć (to have to / must).

This is the 1st person plural form, so:

• muszę = I must
• musisz = you must
• musi = he/she/it must
• musimy = we must
• musicie = you all must
• muszą = they must

So Musimy... starts the sentence with We have to...

Się is part of the verb phrase pozbyć się, which means to get rid of.

You should learn pozbyć się as a single unit, not as pozbyć plus a separately meaningful się in this sentence. Many Polish verbs are used with się, and often English speakers just need to memorize them that way.

So:

• pozbyć się = to get rid of
• musimy się pozbyć = we have to get rid of

Even though się often suggests a reflexive idea, here the whole expression simply means get rid of, not literally rid ourselves in a word-for-word way.

This is an aspect difference.

• pozbyć się = perfective
• pozbywać się = imperfective

In this sentence, pozbyć się is used because the speaker is talking about successfully getting rid of the problem as a completed result.

Compare:

• Musimy się pozbyć problemu. = We need to get rid of the problem.
  (focus on achieving the result)

• Musimy się pozbywać problemów na bieżąco. = We need to keep getting rid of problems as they arise.
  (focus on an ongoing/repeated process)

After musimy, Polish can use either aspect depending on meaning, so the aspect choice is important.

In Polish, the particle się often moves around in the sentence and does not always stay directly attached to the infinitive in writing.

So these mean the same thing:

• Musimy się pozbyć problemu.
• Musimy pozbyć się problemu.

Both are correct.

Polish often places się earlier in the sentence, especially after the first verb, which is why Musimy się pozbyć problemu sounds very natural.

Because pozbyć się requires the genitive case.

The noun problem is masculine, and its genitive singular form is problemu.

So:

• problem = nominative
• problemu = genitive

After pozbyć się, you say what you are getting rid of in the genitive:

• pozbyć się problemu = get rid of the problem
• pozbyć się starego auta = get rid of the old car
• pozbyć się kłopotów = get rid of troubles

This is something worth memorizing: pozbyć się + genitive.

It is singular.

• problemu = of the problem / the problem in genitive singular
• problemów = of problems in genitive plural

So:

• Musimy się pozbyć problemu. = We need to get rid of the problem / a problem
• Musimy się pozbyć problemów. = We need to get rid of the problems / problems

As often in Polish, there is no separate word for the or a, so context decides whether it is definite or indefinite.

Polish usually does not use articles like a and the.

That means problemu can mean:

• a problem
• the problem

The exact meaning comes from context.

So Musimy się pozbyć problemu could mean:

• We need to get rid of the problem
• We need to get rid of a problem

In many real situations, English translations choose the problem because it sounds more natural when a specific issue is already being discussed.

Yes, Polish word order is more flexible than English, though some versions sound more natural than others.

These are possible:

• Musimy się pozbyć problemu.
• Musimy pozbyć się problemu.

Both are natural and correct.

You could also move words for emphasis, but that is less neutral. The most standard version for a learner is the original one.

In neutral speech, Musimy się pozbyć problemu sounds very natural.

Yes.

• musimy się pozbyć = we must / we need to get rid of
• chcemy się pozbyć = we want to get rid of

So musimy expresses necessity, obligation, or urgency, while chcemy expresses only desire.

Compare:

• Musimy się pozbyć problemu. = It is necessary.
• Chcemy się pozbyć problemu. = We would like to, but it may not be necessary.

A rough pronunciation guide is:

• pozbyć się ≈ POZ-bihch sheng

A bit more carefully:

• poz- like poz
• -być has a soft final consonant; y is not the English ee
• się is pronounced roughly like sheng or shyeh depending on the speaker and context, though the exact nasal sound is hard to match in English

Also:

• Musimy się pozbyć problemu
• roughly: moo-SHIH-mih sheng poz-BIHCH pro-BLEH-moo

This is only approximate. The main thing to notice is that się is not pronounced like written see-eh.

It sounds neutral and very natural.

• not especially formal
• not slangy
• appropriate in everyday conversation, work discussions, and general writing

If you wanted something more formal, you might choose a different expression depending on context, but Musimy się pozbyć problemu is completely normal standard Polish.

Grammatically yes, but normally problem means an actual problem/issue, not a person.

If a person is being called a problem, then the sentence could be understood metaphorically, just as in English. But without context, the natural meaning is simply:

We need to get rid of the problem.

So the sentence itself is neutral; any rude or metaphorical meaning would come from the situation, not from the grammar.