Mi tía compró un sombrero nuevo para pasear al mediodía.

Mi tía is the normal, neutral way to say my aunt in Spanish.

Spanish usually puts possessive adjectives like mi, tu, su, nuestro before the noun:

• mi tía = my aunt
• tu casa = your house

You can say la tía mía, but that sounds much less common and usually more emphatic, literary, or regional. For everyday speech, mi tía is the form learners should use.

The accent mark in tía shows that the í is stressed and forms a separate syllable from a:

• tía = tí-a (two syllables)

Without the accent, Spanish spelling rules would tend to make the vowels combine differently. The written accent helps show the correct pronunciation.

This is also why you see accents in similar family words:

• tío = uncle
• tía = aunt

Compró is the preterite form of comprar for él/ella/usted:

• yo compré
• tú compraste
• él/ella compró

Here it agrees with mi tía, which is she.

The preterite is used because the sentence describes a completed action in the past: she bought the hat.

Compare:

• compró = she bought
• compra = she buys / is buying
• compraba = she used to buy / was buying

So mi tía compró means my aunt bought.

The accent mark distinguishes compró from compro:

• compro = I buy
• compró = he/she bought

That accent is very important because it changes both the pronunciation and the meaning.

So:

• Yo compro = I buy
• Mi tía compró = My aunt bought

Both are possible, but they do not sound exactly the same.

In Spanish, adjectives often come after the noun:

• un sombrero nuevo = a new hat

This is the most straightforward, literal description: the hat is new.

If you say un nuevo sombrero, the adjective before the noun can sound a bit more subjective or stylistic, and sometimes it can suggest another/new different hat, depending on context.

So in a simple sentence like this, un sombrero nuevo is the most natural choice.

Because Spanish does not use an extra preposition there the way English sometimes does.

• para + infinitive means in order to / for the purpose of
• pasear is the infinitive to stroll / to go for a walk

So:

• para pasear = to go for a walk / for walking / in order to stroll

Spanish says this directly, without adding another word equivalent to English to before pasear, because the infinitive itself already includes the idea to walk/stroll.

Here, pasear means something like to go for a walk, to stroll, or to take a walk.

That is slightly different from simply caminar, which is more literally to walk.

In many contexts:

• caminar = to walk, as a physical action
• pasear = to stroll, go out for a walk, walk around leisurely

So para pasear al mediodía suggests the hat is for going out for a walk around midday.

Because a + el contracts to al in Spanish.

So:

• a + el mediodía → al mediodía

This contraction is required in standard Spanish, except when el is part of a proper name.

Examples:

• Voy al parque = I’m going to the park
• Llegó al mediodía = He/She arrived at midday

So al mediodía is the correct form.

Al mediodía means at midday, around noon, or at noon, depending on context.

It refers to the middle of the day. In everyday use, it often means roughly around noon, not necessarily exactly 12:00.

Related time expressions:

• por la mañana = in the morning
• al mediodía = at midday / around noon
• por la tarde = in the afternoon
• por la noche = at night / in the evening

It could be para caminar in some contexts, but para pasear sounds more natural if the idea is a pleasant walk or stroll.

The difference is often:

• caminar = to walk
• pasear = to stroll / go for a walk

A sombrero for pasear al mediodía suggests something you wear for a leisurely outing in the sun, which fits pasear very well.

Yes. You could say un nuevo sombrero, but the meaning may shift slightly.

Compare:

• un sombrero nuevo = a hat that is new
• un nuevo sombrero = a new hat, often with the sense of another or a different new one

This is one of those adjective-position differences that Spanish often uses for nuance. For learners, the safest default is:

• descriptive adjective after the noun: sombrero nuevo

The given word order is the most natural neutral order:

• Mi tía compró un sombrero nuevo para pasear al mediodía.

But Spanish can change word order for emphasis or style. For example:

• Para pasear al mediodía, mi tía compró un sombrero nuevo.
• Un sombrero nuevo compró mi tía para pasear al mediodía.

These alternatives are possible, but they sound more marked or literary. For normal conversation and writing, the original order is the best model.

Sombrero usually just means hat in general.

In English, sombrero often refers to a particular wide-brimmed Mexican-style hat, but in Spanish the word is much broader. It can refer to many kinds of hats.

So in this sentence, un sombrero nuevo simply means a new hat, not necessarily a special traditional one.