Powtarzam to wyrażenie kilka razy.

Polish often drops subject pronouns when they are not needed. The verb form powtarzam already tells you the subject is I.

• powtarzam = I repeat / I am repeating
• If you added ja, it would sound more emphatic: Ja powtarzam to wyrażenie kilka razy.

So in normal speech, leaving out ja is completely natural.

Powtarzam is the 1st person singular present tense form of the verb powtarzać.

So:

• powtarzać = to repeat
• powtarzam = I repeat / I am repeating

The ending -am is a common ending for I in some Polish verb patterns.

It can mean either one, depending on context.

Polish present tense often covers both:

• I repeat
• I am repeating

Because powtarzać is an imperfective verb, it can describe:

• an action happening right now
• a repeated or habitual action

So this sentence could mean either that the speaker is repeating it at the moment, or that they do it several times in a situation being described.

Because powtarzać is the imperfective verb, and that fits well with an action that is repeated.

In Polish, aspect matters a lot:

• powtarzać = imperfective, focusing on the process or repeated action
• powtórzyć = perfective, focusing on a completed repetition

So:

• Powtarzam to wyrażenie kilka razy emphasizes the act of repeating.
• A perfective form would sound more like a completed event, for example in the future: Powtórzę to wyrażenie kilka razy = I will repeat this expression several times.

Here to is a demonstrative adjective, meaning this.

It agrees with wyrażenie:

• ten for masculine nouns
• ta for feminine nouns
• to for neuter nouns

Since wyrażenie is neuter, the correct form is to.

So to wyrażenie means this expression.

Because wyrażenie is a neuter singular noun, and to is the neuter singular form of this.

Also, in this sentence wyrażenie is the direct object, so it is in the accusative case. But for many neuter singular nouns, the nominative and accusative look the same.

So:

• nominative: to wyrażenie
• accusative: to wyrażenie

That is why the form does not visibly change.

Because it is a neuter singular noun, and in Polish the accusative singular of most neuter nouns is the same as the nominative singular.

The verb powtarzam takes a direct object, so wyrażenie is in the accusative. But the form stays wyrażenie.

This is very common with neuter nouns.

Kilka razy means several times or a few times.

• kilka = several / a few
• razy = times

This is the normal Polish way to count repetitions:

• raz = once / one time
• dwa razy = twice / two times
• trzy razy = three times
• kilka razy = several times

It is best learned as a very common fixed pattern: number/quantity + razy.

Yes. They are similar, but the tone is slightly different.

• kilka razy = several times
• parę razy = a couple of times / a few times, often a bit more casual
• kilkakrotnie = several times, but more formal or written

So your original sentence is completely natural and neutral.

Yes. Polish word order is more flexible than English word order.

The neutral order here is:

• Powtarzam to wyrażenie kilka razy

But you could also hear:

• To wyrażenie powtarzam kilka razy
• Kilka razy powtarzam to wyrażenie

These versions shift the emphasis:

• putting to wyrażenie earlier can emphasize this expression
• putting kilka razy earlier can emphasize several times

The basic meaning stays the same.

A rough pronunciation is:

vy-ra-ZHE-nye

A few useful points:

• wy- sounds roughly like vih or vy
• ż sounds like the s in measure
• enie often sounds like e-nye

So wyrażenie is approximately vy-ra-ZHE-nye.

If pronunciation is tricky, the cluster rz/ż and the ending -enie are the parts to practice most.

Not exactly.

• słowo = word
• wyrażenie = expression / phrase

So wyrażenie usually refers to more than just a single word, or at least to a unit of language treated as an expression.

That is why to wyrażenie is best understood as this expression rather than this word.