Urmakeren undersøker armbåndsuret.

Because -en is the definite singular ending for many Norwegian nouns.

• urmaker = a watchmaker / watch repairer
• urmakeren = the watchmaker

In Norwegian, the definite article is often attached to the end of the noun instead of being a separate word like English the.

So:

• en urmaker = a watchmaker
• urmakeren = the watchmaker

Because armbåndsur is a neuter noun.

In Norwegian, noun gender affects the indefinite article and the definite ending:

• common gender: often en ... / ...-en
• neuter: et ... / ...-et

So:

• et armbåndsur = a wristwatch
• armbåndsuret = the wristwatch

That is why it ends in -et, not -en.

Because Norwegian usually puts definiteness on the noun itself.

Instead of saying something like the watchmaker with a separate article, Norwegian normally says:

• urmakeren = the watchmaker
• armbåndsuret = the wristwatch

This is one of the biggest differences from English.
The definite idea is built into the noun ending.

Undersøker is the present tense of the verb å undersøke.

• å undersøke = to examine / investigate / inspect
• undersøker = examines / is examining

Norwegian present tense is often made by adding -er to the infinitive stem:

• å snakke → snakker
• å kjøpe → kjøper
• å undersøke → undersøker

Unlike English, Norwegian does not usually change the verb for different persons:

• jeg undersøker
• du undersøker
• han undersøker

The verb form stays the same.

Because Norwegian usually writes compound nouns as a single word.

So armbåndsur is made up of:

• armbånd = bracelet / wristband
• ur = watch / timepiece

Together:

• armbåndsur = wristwatch

This is very normal in Norwegian. English often uses two words or a hyphen where Norwegian uses one compound word.

Other examples:

• skolebok = schoolbook
• sommerferie = summer holiday
• tannlege = dentist (literally tooth doctor)

That -s- is a linking sound/letter often used in Norwegian compounds.

Here the compound is:

• armbånd
  • ur → armbåndsur

The s helps connect the parts smoothly.
This linking s is common, but not every compound uses it, so it is something you often learn word by word.

For a learner, the safest approach is to treat armbåndsur as the standard dictionary form.

The sentence follows the normal main-clause order:

Subject + Verb + Object

• Urmakeren = subject
• undersøker = verb
• armbåndsuret = object

So:

• Urmakeren undersøker armbåndsuret.

This is very similar to standard English word order:

• The watchmaker examines the wristwatch.

Yes, but it means something slightly different.

• Urmakeren undersøker armbåndsuret = The watchmaker is examining the wristwatch
  
  • a specific wristwatch
• Urmakeren undersøker et armbåndsur = The watchmaker is examining a wristwatch
  
  • not necessarily a specific one already known

So the sentence you were given uses the definite form: a particular wristwatch.

They are:

• urmaker — usually common gender
  • en urmaker
  • urmakeren
• armbåndsur — neuter
  • et armbåndsur
  • armbåndsuret

Knowing the gender is important because it affects:

1. the indefinite article (en/et)
2. the definite ending (-en/-et)

It can refer more broadly to someone who makes or repairs timepieces, so depending on context it may cover watches and clocks. In everyday English, watchmaker is often the best translation here, especially because the object is armbåndsuret (the wristwatch).

So in this sentence, watchmaker is the most natural choice.

This is a very common question.

• ur often means a timepiece in a somewhat formal or technical sense
• klokke is very common in everyday speech and can mean clock or watch, depending on context

In compounds and more formal vocabulary, ur is very common:

• urmaker = watchmaker
• armbåndsur = wristwatch

In casual conversation, many speakers would often use klokke in situations where English speakers say watch or clock.

So armbåndsur is perfectly correct, but it can sound a bit more formal or lexical than the most everyday speech.

The letter ø is a vowel that does not exist in standard English.

A rough guide:

• it is somewhat similar to the vowel in French deux or German schön
• your lips are rounded, but the tongue is placed more forward than for English o

In undersøker, both ø sounds are the same letter:

• un-der-sø-ker

A rough learner-friendly approximation might be something like UN-der-suh-ker, but that is only approximate. It is better to listen to native audio if possible.

Because Norwegian does not need an extra helping verb here.

English may say:

• The watchmaker examines the wristwatch
• The watchmaker is examining the wristwatch

Norwegian can simply use the present tense:

• Urmakeren undersøker armbåndsuret

This can often cover both a simple present and a present progressive meaning, depending on context.

Yes. Norwegian is a verb-second (V2) language in main clauses.

The normal statement is:

• Urmakeren undersøker armbåndsuret.

But if you start with another element, the verb usually comes second:

• Nå undersøker urmakeren armbåndsuret.
  Now the watchmaker is examining the wristwatch.

And in a yes/no question:

• Undersøker urmakeren armbåndsuret?
  Is the watchmaker examining the wristwatch?

So this sentence is in normal statement order, but the verb can move depending on structure.

Because the sentence is talking about a specific wristwatch, not just any wristwatch.

Norwegian often marks exactly how specific something is:

• et armbåndsur = a wristwatch
• armbåndsuret = the wristwatch

So the speaker assumes the listener knows which wristwatch is meant, or that it has already been identified in the situation or conversation.