Kunnskapen er viktig.

Because kunnskapen is the definite singular form of the noun, meaning the knowledge.

• kunnskap = knowledge
• kunnskapen = the knowledge

In Norwegian, definiteness is often added as an ending to the noun instead of using a separate word like the.

Kunnskap is usually treated as a masculine noun in Bokmål.

Its forms are typically:

• en kunnskap = a piece of knowledge / a knowledge
• kunnskapen = the knowledge

That said, kunnskap is often used more like an uncountable noun, similar to English knowledge, so you will usually see it without en in many contexts. In this sentence, the important thing is that the definite form becomes kunnskapen.

Because Norwegian usually puts definiteness on the noun itself.

So instead of:

• the knowledge

Norwegian often says:

• kunnskapen

This is very common in Norwegian:

• boken = the book
• bilen = the car
• jenta = the girl

So -en here is doing the job that the does in English.

Er is the present tense of å være (to be).

So:

• er = is / am / are

In Kunnskapen er viktig, the sentence is simply linking the subject to a description:

• The knowledge is important

This is a basic subject + verb + adjective structure.

Because viktig is the correct adjective form here for a singular noun in this kind of sentence.

Compare:

• Kunnskapen er viktig = The knowledge is important
• Bøkene er viktige = The books are important

In predicate position, after er, adjectives still agree in number where needed. Since kunnskapen is singular, viktig is correct.

It follows a very common Norwegian pattern:

• Subject + verb + adjective

Here:

• Kunnskapen = subject
• er = verb
• viktig = adjective

This is the same kind of structure as:

• Huset er stort = The house is big
• Maten er god = The food is good

Yes, but it means something slightly different.

• Kunnskap er viktig = Knowledge is important
• Kunnskapen er viktig = The knowledge is important

The first is a general statement about knowledge as a concept. The second points to specific knowledge, or knowledge already known from the context.

Usually, it behaves a lot like English knowledge, so it is often treated as something uncountable in everyday use.

That means:

• Kunnskap er viktig sounds very natural.
• En kunnskap is grammatically possible, but much less common in ordinary usage.

So learners will most often meet kunnskap in broader or abstract uses rather than as a clearly countable noun.

A rough pronunciation guide is:

• KUNN-skah-pen

A few notes:

• The u in kunn- is short.
• The sk before a is pronounced like a normal sk, not like English sh.
• The ending -en is the definite ending.

Pronunciation varies somewhat by dialect, but that rough version is a good start.

Because kunnskapen is already the subject of the sentence.

So:

• Kunnskapen er viktig = The knowledge is important

But Det er viktig means:

• It is important

That is a different sentence structure. Det is used when it is the subject, but here the subject is directly named: kunnskapen.

Yes, but only in certain situations.

The normal neutral order is:

• Kunnskapen er viktig

If you move something else to the front, Norwegian usually keeps the verb in second position:

• Derfor er kunnskapen viktig = Therefore, the knowledge is important

But in a simple statement like this, Kunnskapen er viktig is the standard and most natural order.

This is Bokmål.

In Nynorsk, you would more likely see:

• Kunnskapen er viktig

This particular sentence actually looks the same in both standards, so without more context, it works for both.