Reservamos una habitación doble.

Reservamos is the first person plural form of reservar (to reserve / to book), so it means we reserve, we are reserving, or we reserved, depending on context.

This form can be:

• present tense: we book / we are booking
• preterite (simple past): we booked

Spanish has some verb forms that look identical in these two tenses, and reservamos is one of them.

You usually know from context.

For example:

• Ahora reservamos una habitación doble. = Now we’re booking a double room.
• Ayer reservamos una habitación doble. = Yesterday we booked a double room.

Without extra context, the sentence Reservamos una habitación doble could be understood either way.

Because habitación is a feminine noun.

In Spanish, articles must agree with the noun’s gender:

• un = masculine singular
• una = feminine singular

So:

• una habitación
• un hotel

A useful clue is that nouns ending in -ción are usually feminine:

• la habitación
• la estación
• la reserva

Because in Spanish, adjectives usually come after the noun.

So:

• habitación doble = double room
• cama doble = double bed

This is one of the most common word-order differences from English, where adjectives usually come before the noun.

Not in the singular here. Doble stays the same for both masculine and feminine singular nouns:

• un cuarto doble
• una habitación doble

In the plural, it becomes:

• habitaciones dobles

So it does change for number, but not for gender in this case.

Yes, you can, but you usually don’t need to.

Spanish often leaves out subject pronouns because the verb ending already tells you who is doing the action:

• Reservamos = we reserve / we booked

Adding nosotros is usually for:

• emphasis
• contrast
• clarity

For example:

• Nosotros reservamos una habitación doble, pero ellos reservaron dos.

Here, una usually means a / an.

Spanish un / una can mean:

• the indefinite article: a / an
• the number: one

In this sentence, the most natural reading is a double room. If you wanted to strongly emphasize the number one, context or stress would usually make that clearer.

Yes. Habitación is the standard and natural word for a room, especially a hotel room.

In Spain, habitación doble is a very common phrase in hotels.

Other words exist, but they are not always the best choice here:

• cuarto can mean room, but often refers more generally to a room in a house
• in hotel contexts, habitación is usually the safer and more natural option

The accent mark shows where the stress goes: habitaCIÓN.

This is important because, without the written accent, Spanish stress rules would suggest a different pronunciation.

Also, many nouns ending in -ción have this pattern:

• habitación
• información
• estación

So the accent helps you pronounce the word correctly.

A rough pronunciation guide is:

reh-sehr-VAH-mos OO-nah ah-bee-tah-THYON DOH-bleh

A few key points for Spain Spanish:

• h in habitación is silent
• c before i is pronounced like th in much of Spain, so -ción sounds like -thyon
• v in reservamos is pronounced very similarly to b in Spanish

So habitación in Spain sounds roughly like ah-bee-tah-THYON.

Yes, but that changes the subject.

• Reservamos = we booked / we book
• Reservé = I booked
• Reservó = he/she/you formal booked

So if you are talking about we, then reservamos is correct. If you are talking about I, then you would say reservé.

Yes. Reservar is the standard verb for to reserve / to book things like:

• hotel rooms
• tables
• tickets

Examples:

• Reservamos una mesa.
• Reservé un hotel.
• ¿Han reservado habitación?

So in a hotel context, reservar una habitación is completely natural.