Mi amiga y yo queremos dar un chapuzón antes de volver a casa.

Both are grammatically possible, but mi amiga y yo sounds more natural and polite in Spanish, just like my friend and I is usually preferred over I and my friend in English.

Putting yourself second is very common in both Spanish and English.

Queremos means we want.

It is plural because the subject is mi amiga y yo = my friend and I, which means we.

It comes from the verb querer:

• yo quiero = I want
• tú quieres = you want
• él/ella quiere = he/she wants
• nosotros/nosotras queremos = we want

So mi amiga y yo queremos literally means my friend and I want.

In Spanish, querer is often followed by an infinitive, just like to want to do something in English.

So:

• queremos = we want
• dar = to give

Together, queremos dar un chapuzón literally means we want to give a dip, but in natural English it means we want to have/take a dip.

This structure is very common:

• quiero comer = I want to eat
• queremos salir = we want to go out
• quieren descansar = they want to rest

This is an idiomatic expression.

Dar un chapuzón means to have a quick swim / take a dip. Spanish often uses dar + noun in expressions where English uses a single verb or a different phrase.

For example:

• dar un paseo = to take a walk
• dar un abrazo = to give a hug
• dar un baño = to take a bath
• dar un chapuzón = to take a dip

So you should learn dar un chapuzón as a set expression.

Chapuzón usually means a quick dip in the water, often for fun or to cool off.

It suggests something casual, not necessarily a long or serious swim.

In Spain, dar un chapuzón is very natural for situations like:

• jumping into the sea for a moment
• having a quick swim in a pool
• cooling off at the beach

So it feels more like a dip than a full swim session.

Yes. Darnos un chapuzón is also possible and can sound very natural.

Compare:

• queremos dar un chapuzón
• queremos darnos un chapuzón

Both mean basically we want to take a dip.

The version with darnos adds the reflexive idea often used for actions people do for themselves, and many speakers would use it naturally. But dar un chapuzón is also perfectly correct.

Because in Spanish, antes de is the normal structure before an infinitive.

So:

• antes de volver = before going back / before returning
• antes de comer = before eating
• antes de salir = before leaving

You use:

• antes de + infinitive when the subject stays general or is the same
• antes de que + subjunctive when there is a new subject

For example:

• Antes de volver a casa, queremos dar un chapuzón.
• Antes de que vuelva a casa, quiero hablar con ella.

Volver a casa is the normal way to say to go back home / return home.

A few key points:

• volver a = to return to / go back to
• casa without an article often means home

So:

• volver a casa = return home
• llegar a casa = arrive home
• estar en casa = be at home

You usually do not say a la casa when you mean home in a general sense.

You would use the article if you mean a specific house:

• Volvemos a la casa de Ana. = We’re going back to Ana’s house.

Because casa often behaves like home in English in certain common expressions.

Compare:

• Estoy en casa. = I’m at home.
• Voy a casa. = I’m going home.
• Vuelvo a casa. = I’m returning home.

But if you mean a particular house, you normally use an article or another determiner:

• Voy a la casa. = I’m going to the house.
• Voy a su casa. = I’m going to his/her house.

So in your sentence, a casa means home, not to the house.

Yes, absolutely.

Spanish often drops subject pronouns and even full subjects when they are clear from context. So if it is already obvious who is speaking, you could simply say:

• Queremos dar un chapuzón antes de volver a casa.

However, mi amiga y yo is included here to make the subject explicit. It tells you exactly who we are.

Both are correct.

• to return is a bit more formal in English
• to go back is more everyday and conversational

So:

• antes de volver a casa = before returning home
• antes de volver a casa = before going back home

Both are good translations.

Y simply means and.

So:

• mi amiga = my friend
• yo = I
• mi amiga y yo = my friend and I

One small pronunciation note: y is normally pronounced like an ee sound when it means and.

The accent mark shows where the stress goes: cha-pu-ZÓN.

Without the written accent, Spanish stress rules would make you expect the stress somewhere else. The accent mark tells you clearly that the last syllable is stressed.

So pronounce it roughly like:

• cha-poo-THON in much of Spain
• or cha-poo-SON in places where z sounds like s

In Spain, standard Peninsular pronunciation often uses the th sound for z.

Yes, it sounds very natural in Spain.

In Spain, dar un chapuzón is a common everyday way to talk about taking a quick dip in the sea or pool. Other Spanish-speaking regions may also use it, but depending on the country, people might prefer other expressions too.

So for Spanish from Spain, this phrase is a very good one to learn.

You could, but the meaning changes a bit.

• queremos nadar = we want to swim
• queremos dar un chapuzón = we want to take a dip

Nadar focuses on the activity of swimming.
Dar un chapuzón suggests a quick, casual, refreshing time in the water.

So if the idea is just jumping in for a bit before going home, dar un chapuzón is the better choice.