Handbremsan virkar.

Because -an is the definite article attached to the noun.

• handbremsa = handbrake / a handbrake
• handbremsan = the handbrake

In Icelandic, the is often added to the end of the noun instead of being a separate word as in English.

The dictionary form is handbremsa.

That is the indefinite singular nominative form, the form you would normally look up in a dictionary.
So if you want to memorize the word, learn it as:

• handbremsa = handbrake

It is a feminine noun.

That matters because noun gender affects:

• the form of the definite article
• adjective endings
• some pronouns and agreement patterns

Here, the feminine nominative singular definite ending gives you handbremsan.

Virkar is the present-tense form of the verb virka, which means to work, to function, or to operate.

So Handbremsan virkar. uses virka in the sense of something functioning properly.

This is different from English, where learners may expect something like is working. In Icelandic, virka by itself already carries that idea.

Because the subject, handbremsan, is third-person singular.

The basic pattern is:

• ég virka = I work / function
• þú virkar = you work / function
• hann / hún / það virkar = he / she / it works / functions

Since handbremsan is a singular thing, Icelandic uses the third-person singular form: virkar.

It is in the nominative singular.

That is because it is the subject of the sentence — the thing that is doing the action of functioning.

So in this sentence:

• handbremsan = subject
• virkar = verb

If the noun were used in another role, its ending could change.

Yes. Handbremsan virkar. has the normal declarative order:

• subject + verb

That is the most straightforward word order for a simple statement in Icelandic.

If you turned it into a yes/no question, you would usually switch the order:

• Virkar handbremsan? = Does the handbrake work?

You would say:

• Handbremsan virkar ekki.

The word ekki means not and usually comes after the verb in a simple sentence like this.

So:

• virkar = works
• virkar ekki = does not work / isn’t working

Yes. In many contexts, handbremsa can correspond to English handbrake or parking brake.

The exact English translation depends on context and dialect, but the Icelandic word refers to that brake mechanism in a car.

A rough English-friendly approximation is:

• handbremsan ≈ HANT-brehm-san
• virkar ≈ VIR-kar

A few useful notes:

• The r is an Icelandic rolled or tapped r
• The final -an in handbremsan is the attached the
• The pronunciation is not exactly like English, but this approximation is good enough for a beginner

Yes, but it changes the meaning.

• Handbremsan virkar. = The handbrake works.
• Handbremsa virkar. = A handbrake works or Handbrake works in a more general sense

In a real situation, if you mean a specific handbrake in a specific car, the definite form handbremsan is the natural choice.