Instruktøren viser trykkpunktet og brystkompresjonen.

Because Norwegian usually puts the definite article at the end of the noun.

• en instruktør = an instructor
• instruktøren = the instructor

So -en here is the definite ending for a masculine/common-gender noun in singular.

In Norwegian, the is often built into the noun instead of standing in front of it.

Compare:

• English: the instructor
• Norwegian: instruktøren

The same happens with the other nouns in the sentence:

• trykkpunktet = the pressure point
• brystkompresjonen = the chest compression

So the definiteness is shown by the endings -en and -et, not by a separate word like the.

Norwegian verbs are much simpler than English verbs in this way. The verb form usually stays the same no matter who the subject is.

• jeg viser = I show
• du viser = you show
• han viser = he shows
• instruktøren viser = the instructor shows

So viser is just the present tense form of å vise.

The sentence follows normal Norwegian main-clause word order:

Subject + Verb + Object

• Instruktøren = subject
• viser = verb
• trykkpunktet og brystkompresjonen = object

So it works very much like English here:

• The instructor shows the pressure point and the chest compression.

Because Norwegian nouns have genders, and the definite ending depends on the gender.

• et trykkpunkt → trykkpunktet
• en instruktør → instruktøren
• en brystkompresjon → brystkompresjonen

So:

• -et is the common definite singular ending for many neuter nouns
• -en is the common definite singular ending for many masculine/common-gender nouns

It is singular definite.

• en brystkompresjon = a chest compression
• brystkompresjonen = the chest compression

The plural would be something like:

• brystkompresjoner = chest compressions
• brystkompresjonene = the chest compressions

So in your sentence, it is grammatically one item or one technique/concept, not a plural form.

Because Norwegian makes heavy use of compound nouns, and they are normally written as one word.

• trykk + punkt → trykkpunkt
• bryst + kompresjon → brystkompresjon

This is very normal in Norwegian. English often writes similar ideas as two words, but Norwegian usually joins them together.

Og means and. It joins the two objects of the verb:

• trykkpunktet
• brystkompresjonen

So the instructor is showing both things.

Yes, but it changes the meaning.

• Instruktøren viser ... = The instructor shows ...
• En instruktør viser ... = An instructor shows ...

So the original sentence refers to a specific instructor, while en instruktør would be nonspecific.

There actually is definiteness on the second noun too, but it is again attached to the noun itself:

• trykkpunktet = the pressure point
• brystkompresjonen = the chest compression

Norwegian does not need a separate word before each noun in a structure like this, because the definite endings already do the job.

The dictionary form is usually the indefinite singular, often shown with its article.

For the nouns here:

• en instruktør
• et trykkpunkt
• en brystkompresjon

The sentence uses the definite singular forms:

• instruktøren
• trykkpunktet
• brystkompresjonen

So when looking words up, remove the definite ending and check the base form.

It sounds fairly natural, but the vocabulary is somewhat technical or instructional, especially trykkpunktet and brystkompresjonen. That makes sense if the context is first aid, CPR, or training.

A native speaker would not find the grammar strange; it just sounds like the kind of sentence you would hear in a lesson, demonstration, or manual.

A few pronunciation points:

• instruktøren: the ø is a rounded vowel that does not exist in standard English
• trykkpunktet: the y is also a rounded front vowel, unlike normal English y
• brystkompresjonen: again, y in bryst

If you are just starting, it helps to remember:

• ø is often similar to the vowel in French deux or German schön
• y is similar to the vowel in French tu or German über

You do not need perfect pronunciation immediately, but those two vowels are important in Norwegian because they distinguish words.