La combinación acciona y desbloquea el mecanismo.

Spanish often uses the definite article more than English does.

Here, la combinación means the combination. If the sentence is referring to a specific combination already known from the context, Spanish normally includes the article.

Without the article, combinación would sound more general or incomplete in this kind of sentence.

In this sentence, combinación most likely means a combination code or combination setting, especially in a mechanical or security context.

The noun combinación can mean different things depending on context, for example:

• a combination or mix
• a combination code
• a set of numbers or settings

So here it is not necessarily a vague combination in the abstract sense; it is probably the sequence that operates the device.

Because one subject can perform more than one action.

In La combinación acciona y desbloquea el mecanismo, the subject la combinación does both things:

• acciona
• desbloquea

This is completely normal in Spanish, just as in English:
The combination activates and unlocks the mechanism.

Spanish does not need to repeat the subject before the second verb.

Acciona is the third person singular present indicative of accionar.

That means it matches the singular subject la combinación.

So the pattern is:

• yo acciono
• tú accionas
• él / ella / usted acciona

Here, la combinación behaves grammatically like it, so the verb is in the él/ella/usted form: acciona.

Accionar is a somewhat technical verb that often means:

• to operate
• to actuate
• to trigger
• to set in motion

In everyday Spanish, especially outside technical contexts, learners may hear other verbs more often, such as:

• activar
• poner en marcha
• hacer funcionar

But accionar is very natural in manuals, engineering, machinery, locks, and mechanisms. In Spain, it sounds quite normal in technical writing.

Because the sentence says that the combination unlocks the mechanism directly.

So desbloquea is a normal transitive verb here:

• subject: la combinación
• object: el mecanismo

If you said se desbloquea, that would shift the meaning toward it gets unlocked or it unlocks itself, depending on context.

Compare:

• La combinación desbloquea el mecanismo = the combination unlocks the mechanism
• El mecanismo se desbloquea = the mechanism unlocks / becomes unlocked

Because it is the direct object, and Spanish normally places the direct object after the verb.

So the structure is:

• La combinación = subject
• acciona y desbloquea = verbs
• el mecanismo = direct object

This is the most neutral word order in Spanish.

You could move things around in special contexts, but this version is the standard, natural order.

Because both verbs share the same object.

In other words, the mechanism is both:

• operated/actuated by the combination
• unlocked by the combination

Spanish avoids repeating the object when the same noun belongs to both verbs.

This works the same way in English:
The combination activates and unlocks the mechanism, not usually activates the mechanism and unlocks the mechanism.

Yes, y changes to e before words that begin with an i sound:

• padre e hijo
• español e inglés

But here the next word is desbloquea, which starts with d, so it stays y:

• acciona y desbloquea

So there is no reason to change it.

Yes. Especially in technical Spanish, one verb can have several good English equivalents depending on what kind of device is being described.

For example:

• accionar could be:

  • actuates
  • activates
  • operates
  • triggers

• desbloquear could be:

  • unlocks
  • releases
  • disengages a lock on

So the exact English wording may vary, even though the Spanish grammar stays the same.

A broad Spain pronunciation would be roughly:

la kom-bi-na-THYON ak-SYO-na ee des-blo-KE-a el me-ka-NIS-mo

A few useful points:

• ci in combinación is pronounced with a th sound in most of Spain
• ll is not present here, so no special issue there
• y before a consonant is pronounced like ee
• the stress falls on:
  • combinación
  • acciona
  • desbloquea
  • mecanismo

It sounds natural, especially in a technical, instructional, or mechanical context.

A native speaker might expect this kind of sentence in:

• a manual
• a patent description
• technical documentation
• instructions for a lock or device

In casual conversation, people might choose less technical wording, but as a formal or technical sentence, it is perfectly natural.