Vigilamos la puerta.

Vigilamos comes from the verb vigilar, meaning to watch, to keep an eye on, or to guard/monitor.

Here, vigilamos means we watch / we are watching.

It is the nosotros form of the present tense:

• yo vigilo = I watch
• tú vigilas = you watch
• él/ella vigila = he/she watches
• nosotros/nosotras vigilamos = we watch
• vosotros/vosotras vigiláis = you all watch
• ellos/ellas vigilan = they watch

So the -amos ending tells you the subject is we.

Because Spanish often leaves out subject pronouns when they are not needed.

The verb ending already tells you who the subject is:

• vigilamos = we watch

So Nosotros vigilamos la puerta is possible, but usually Vigilamos la puerta sounds more natural unless you want emphasis or contrast:

• Nosotros vigilamos la puerta, no ellos.
  We’re watching the door, not them.

It can mean either one, depending on context.

The Spanish present tense often covers both:

• We watch the door = habitual / regular action
• We are watching the door = action happening now

So without extra context, Vigilamos la puerta could mean:

• We watch the door
• We’re watching the door

If you want to make the ongoing sense especially clear, Spanish can also use:

• Estamos vigilando la puerta. = We are watching the door.

Because Spanish usually uses an article where English might or might not.

Here, la puerta means the door.

In this sentence, it sounds natural because it refers to a specific door:

• Vigilamos la puerta. = We watch the door.

Saying just Vigilamos puerta would be incorrect in standard Spanish.

Because la puerta is a thing, not a person.

Spanish uses the personal a before specific human beings (and sometimes pets or personified beings), but not normally before objects.

Compare:

• Vigilamos la puerta. = We watch the door.
• Vigilamos al guardia. = We watch the guard.

So no a is needed before la puerta.

This is a very common question.

• mirar usually means to look at
• vigilar usually means to watch over, to keep an eye on, to monitor, or to guard

So:

• Miramos la puerta could mean we look at the door
• Vigilamos la puerta suggests we are keeping watch on the door, maybe for security or control

Vigilar has a stronger sense of supervision, alertness, or protection.

Yes. Vigilar is a regular -ar verb.

Its present-tense endings follow the normal pattern:

• vigilo
• vigilas
• vigila
• vigilamos
• vigiláis
• vigilan

So if you know regular -ar verbs like hablar or trabajar, this pattern should feel familiar.

In standard Spain Spanish, vigilamos is pronounced approximately:

bee-khee-LAH-mos

More carefully, the gi sounds like the Spanish j sound, a throaty sound similar to the ch in Scottish loch or German Bach.

A rough breakdown:

• vi → bee
• gi → khee / hee-like sound
• la → lah
• mos → moss

Also:

• the v in Spanish is usually pronounced very similarly to b
• the stress falls on la: vigiLAmos

Because the most neutral Spanish word order is:

verb + object
when the subject is omitted.

So:

• Vigilamos = we watch
• la puerta = the door

Together: Vigilamos la puerta.

You could also say:

• Nosotros vigilamos la puerta.

But that adds the subject pronoun and is less neutral unless you want emphasis.

Yes, depending on context, that can be a very natural translation.

Vigilar is broader than just watch in English. It can mean:

• watch
• keep an eye on
• monitor
• guard

So if the context is security, Vigilamos la puerta could very naturally be understood as:

• We guard the door
• We’re keeping watch at the door
• We’re watching the door

Usually puerta means a physical door, but depending on context it can also refer to an entrance or gateway.

So la puerta might be:

• the actual door
• the doorway
• the entrance point

In many situations, English might translate it simply as the door, but the exact sense depends on context.