Quiero comprar unas botas para el invierno.

In Spanish, the subject pronoun is often omitted because the verb ending already tells you who the subject is.

• quiero = I want
• The -o ending shows it is yo

So Quiero comprar... is completely natural and very common. You can say Yo quiero comprar..., but that usually adds emphasis, such as I want to buy them.

After quiero (I want), Spanish usually uses an infinitive, just like English often does:

• Quiero comprar = I want to buy
• Quiero comer = I want to eat
• Quiero salir = I want to go out

So quiero comprar is a standard verb pattern: querer + infinitive.

Unas is the feminine plural form of the indefinite article, so here it means some or a pair of, depending on context.

• unas botas = some boots / a pair of boots
• botas alone = boots in a more general sense

Both can be possible, but unas botas sounds very natural when talking about buying a specific item.

Because botas is a feminine plural noun.

• singular: una bota = a boot
• plural: unas botas = some boots / a pair of boots

In Spanish, articles must agree with the noun in gender and number:

• unos for masculine plural
• unas for feminine plural

The singular form is bota, and nouns ending in -a are often feminine.

So:

• la bota = the boot
• una bota = a boot
• las botas = the boots
• unas botas = some boots

Like many Spanish nouns, the article helps show the gender clearly.

Spanish commonly refers to this kind of item in the plural, just as English often does with boots.

So:

• unas botas is the normal way to say some boots or a pair of boots

You do not usually need to say un par de botas, unless you specifically want to emphasize one pair.

Here para expresses purpose or intended use:

• unas botas para el invierno = boots for winter

That means the boots are intended to be used in winter.

Por would not sound natural here. In this sentence, para is the correct preposition because it means for in the sense of for use in or meant for.

In Spanish, seasons are often used with the definite article:

• el invierno = the winter
• el verano = the summer

So para el invierno is a very natural phrase in Spanish.

You may also hear seasons without the article in some contexts, but with para, para el invierno is especially common.

The sentence follows a very common Spanish structure:

• Quiero = I want
• comprar = to buy
• unas botas = some boots
• para el invierno = for winter

So the pattern is:

verb + infinitive + object + phrase of purpose

This word order is very natural in Spanish and is close to English in this example.

Yes, you can, but the meaning changes slightly.

• Quiero comprar unas botas para el invierno = I want to buy some boots for winter
• Quiero unas botas para el invierno = I want some boots for winter

The second version focuses more on wanting the boots, while the original explicitly includes the action to buy.

Sometimes, yes. Quiero directly means I want, and in some situations it can sound a bit strong or direct, depending on tone and context.

If you want to sound softer or more polite, you could say:

• Me gustaría comprar unas botas para el invierno = I’d like to buy some boots for winter

But quiero comprar... is completely normal when simply stating what you want.

A rough pronunciation guide is:

KYEH-roh kom-PRAHR OO-nahs BOH-tahs PAH-rah el een-BYEHR-noh

A few helpful points:

• qu in quiero sounds like k
• r in quiero is a soft tapped r
• b and v are pronounced very similarly in Spanish, so invierno does not sound like English v
• The stress falls naturally on:
  • QUIE-ro
  • com-PRAR
  • BO-tas
  • in-VIER-no

In standard Spanish, para el invierno is the more natural choice here.

While you may sometimes see article omission in headlines, labels, or very compact style, in a normal sentence you would usually say:

• unas botas para el invierno

So for a learner, para el invierno is the safest and most natural option.