El puño de la chaqueta me aprieta un poco.

Yes, puño can mean fist, but in clothing it also means cuff: the part of a sleeve that goes around the wrist.

So in El puño de la chaqueta, puño does not mean a hand or fist. It means the cuff of the jacket.

This is a good example of a Spanish word having more than one meaning depending on context.

Because puño and manga are different parts of the garment:

• la manga = the sleeve
• el puño = the cuff at the end of the sleeve

So if the tight part is specifically around the wrist, puño is the right word.

Here, me means on me / to me in the sense of “it feels tight on me” or “it squeezes me.”

The subject of the verb is el puño:

• El puño ... aprieta = The cuff ... squeezes / feels tight

And me shows who is affected:

• me aprieta = it squeezes me / it’s tight on me

This is very common in Spanish with things that physically affect a person:

• El zapato me aprieta. = The shoe is tight on me.
• La camisa me queda grande. = The shirt is too big on me.

Because the subject is el puño, which is third person singular.

So the verb has to match el puño:

• el puño aprieta
• not aprieto (which would mean I squeeze / I feel tight)
• not aprietan (which would be they squeeze)

This verb is apretar in the present tense:

• yo aprieto
• tú aprietas
• él/ella aprieta
• nosotros apretamos
• vosotros apretáis
• ellos aprietan

Notice the stem change e → ie in most forms.

Here apretar means something like:

• to squeeze
• to press
• to be tight

So me aprieta un poco means the cuff is pressing on me a bit or feels a bit tight.

In clothing contexts, Spanish often uses apretar where English might prefer be tight:

• Estos zapatos me aprietan. = These shoes are tight on me.

Yes, but the phrasing is a little different.

• El puño de la chaqueta me aprieta un poco.
  = The cuff is squeezing me / feels tight on me.

• El puño de la chaqueta está un poco apretado.
  = The cuff is a little tight.

The first version focuses more on the effect on the person.
The second focuses more on the state of the cuff.

Both are natural, but me aprieta is especially common when talking about clothes that feel too tight.

Spanish often uses the definite article (el / la / los / las) where English uses my, your, his, etc., especially when the owner is obvious from the context.

So instead of saying:

• mi puño de la chaqueta (which would sound odd here)

Spanish naturally says:

• el puño de la chaqueta

And because the sentence already includes me, it is clear whose body is being affected.

Un poco means a little / a bit, and here it modifies aprieta:

• me aprieta un poco = it squeezes me a little

Putting un poco after the verb is very normal in Spanish.

You could think of the structure as:

• subject: El puño de la chaqueta
• indirect object: me
• verb: aprieta
• adverbial phrase: un poco

Yes. Spanish word order is flexible, although the original sentence is very natural.

For example, you might also hear:

• Me aprieta un poco el puño de la chaqueta.

This still means the same thing, but it puts the focus a bit more on how it feels to me.

The original version,

• El puño de la chaqueta me aprieta un poco
  is a straightforward, neutral order.

It is perfectly normal in Spain, and the grammar is general Spanish.

The main thing that may vary by region is vocabulary preference:

• puño for cuff is standard, but in some contexts people may choose other wording depending on the garment or local habits.

But me aprieta to talk about clothing being tight is widely understood and very natural.

The key point is the letter ñ, which is different from n.

• puño sounds roughly like POO-nyo

The ñ is like the ny sound in canyon.

So:

• puño ≈ POO-nyo
• not POO-no

This sound is very important because n and ñ can change the meaning of a word.