Morgenen er stille.

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

• morgen = morning
• morgenen = the morning

So Norwegian often puts the at the end of the noun instead of using a separate word in front.

Yes. In Bokmål, morgen is normally masculine.

That is why the definite form is:

• en morgen = a morning
• morgenen = the morning

If you are learning noun genders, this is a good one to remember as masculine.

In Norwegian, the definite article is usually attached to the noun as a suffix.

So instead of:

• English: the morning

you get:

• Norwegian: morgen + en = morgenen

A separate article like den is usually not needed here.

Compare:

• morgenen = the morning
• den stille morgenen = the quiet morning

When an adjective comes before the noun in a definite phrase, Norwegian often uses both:

• den
  • adjective + noun with definite ending

Er is the present tense of å være, which means to be.

So:

• er = is / am / are, depending on the subject

In this sentence:

• Morgenen er stille = The morning is quiet

Norwegian does not change the present form of the verb for different persons the way English does.
For example:

• jeg er = I am
• du er = you are
• morgenen er = the morning is

It is always er in the present tense.

Because stille is describing the subject through the verb er.

This works just like English:

• The morning is quiet
• Morgenen er stille

The adjective comes after the verb when it is part of a structure like is quiet, is cold, is beautiful, and so on.

Compare:

• en stille morgen = a quiet morning
  
  • adjective before the noun
• Morgenen er stille = The morning is quiet
  
  • adjective after er

Because stille is the normal form of this adjective in this sentence.

This is one of those adjectives where the form you see here is the standard one learners should remember:

• en stille morgen
• et stille rom
• Morgenen er stille
• Rommet er stille

So the safest thing is to learn stille as the form used for quiet / calm / still in sentences like this.

Yes, in this simple sentence it is very similar to English:

• Morgenen = subject
• er = verb
• stille = adjective

So the pattern is:

Subject + verb + adjective

That makes this sentence very beginner-friendly.

However, Norwegian has a strong verb-second rule, so if something else comes first, the verb still stays in second position. For example:

• I dag er morgenen stille = Today, the morning is quiet

So the simple sentence looks like English, but Norwegian word order becomes more important in longer sentences.

Yes, but it means something slightly different.

• en stille morgen = a quiet morning
• morgenen er stille = the morning is quiet

The first is a noun phrase.
The second is a full sentence.

So:

• en stille morgen names a thing
• morgenen er stille says something about it

Usually, yes.

Because it is definite, morgenen usually refers to:

• the morning
• a particular morning
• the current morning, depending on context

So this sentence normally sounds like you are talking about this morning / the morning we are in / a specific morning being discussed, not mornings in general.

If you wanted a more general idea, you would usually phrase it differently.

Yes. Depending on context, stille can mean things like:

• quiet
• calm
• still
• silent

In Morgenen er stille, it often suggests a peaceful, calm, quiet atmosphere.

So even if one English translation is given, the Norwegian word can carry a slightly broader feeling.

That would be:

Den stille morgenen

This is different from:

• Morgenen er stille = The morning is quiet
• Den stille morgenen = The quiet morning

This is a very important difference:

• morgenen er stille = a full sentence
• den stille morgenen = a noun phrase

So if you put the adjective before the noun in a definite phrase, you normally use:

den + adjective + noun with definite ending

Yes, it is natural and correct.

It is a simple, standard Norwegian sentence with:

• a definite noun
• the verb er
• an adjective describing the subject

It sounds calm and descriptive, and it is exactly the kind of sentence structure learners should get comfortable with early on.