Alarmen ringer.

Because -en is the usual definite ending for many masculine nouns in Norwegian. So:

• en alarm = an alarm
• alarmen = the alarm

In this sentence, Norwegian uses the definite form because it is talking about the alarm.

The base form is å ringe, which means to ring or to call, depending on context.

Here the forms are:

• å ringe = infinitive
• ringer = present tense

So Alarmen ringer uses the present tense of å ringe.

In Norwegian, the present tense of verbs is usually made by adding -r to the infinitive stem.

For å ringe:

• infinitive: ringe
• present: ringer

This is very common in Bokmål:

• å snakke → snakker
• å bo → bor
• å komme → kommer

So ringer simply means rings / is ringing.

It can mean both, depending on context.

Norwegian often uses the simple present where English might use either:

• the alarm rings
• the alarm is ringing

So Alarmen ringer can describe:

• something happening right now, or
• something that generally happens

The exact meaning comes from the situation.

Yes. Alarmen is the subject, and ringer is the verb.

So the sentence structure is:

• Alarmen = subject
• ringer = verb

This is the normal Norwegian word order for a simple statement: subject + verb.

Yes. Å ringe is a very common verb that can mean both:

• to ring
• to call / phone

Examples:

• Telefonen ringer. = The phone is ringing.
• Jeg ringer deg. = I’ll call you / I’m calling you.

In Alarmen ringer, the meaning is clearly about a sound being made.

A useful learner-friendly approximation is:

• ringer ≈ RING-er

A few pronunciation notes:

• The r is Norwegian r, which varies by region.
• The i is short.
• The ng sounds like the ng in sing.
• The final -er is usually pronounced clearly, but not strongly stressed.

So the stress is mainly on the first syllable: RING-er.

Usually no. In ringer, the ng is pronounced like the ng sound in English sing, not like ng + hard g in finger for many speakers.

So it is closer to:

• ring-er with ng as one sound

This is an important pronunciation pattern in many Norwegian words with ng.

Because Norwegian usually says exactly what the subject is, just as English can.

Here the subject is already named:

• Alarmen = the alarm

So there is no need for an extra pronoun. The sentence already means:

• The alarm rings
• The alarm is ringing

Yes, it is completely natural. It is a short, standard sentence that a Norwegian speaker could easily say in everyday life.

It sounds like a normal observation:

• Alarmen ringer.

Simple sentences like this are very common in Norwegian, especially in basic descriptions of what is happening.