Krisen er alvorlig.

Krisen means the crisis, while krise means a crisis or just crisis in a general sense.

In Norwegian, the definite article is usually attached to the end of the noun:

• en krise = a crisis
• krisen = the crisis

So Krisen er alvorlig literally means The crisis is serious.

Er means is / am / are. It is the present tense of the verb å være (to be).

Like English to be, this verb is irregular:

• å være = to be
• er = am / is / are

Examples:

• Jeg er trøtt = I am tired
• Han er glad = He is happy
• Krisen er alvorlig = The crisis is serious

Alvorlig is an adjective meaning serious. In this sentence, it comes after er, so it is a predicate adjective.

In Norwegian, predicate adjectives often stay in their basic form, but they still agree in some cases. Here, krisen is a singular noun, and alvorlig is the correct singular/common-gender form.

Compare:

• En krise er alvorlig = A crisis is serious
• Et problem er alvorlig = A problem is serious
• Problemene er alvorlige = The problems are serious

So in your sentence, alvorlig is correct because the noun is singular.

Krise is normally a feminine noun, but in Bokmål many feminine nouns can also be treated as common gender nouns.

That means you may see:

• ei krise / krisa or
• en krise / krisen

Both patterns can be acceptable in Bokmål, depending on style and preference.

In your sentence, krisen uses the common-gender pattern, which is very common.

Yes. In Bokmål, Krisa er alvorlig is also possible if you use the feminine form of the noun.

So you may see both:

• Krisen er alvorlig
• Krisa er alvorlig

They mean the same thing: The crisis is serious.

The version with -en is often safer for learners because many feminine nouns can be used that way in Bokmål.

Yes. This is the normal word order for a simple statement:

Subject + verb + adjective/complement

• Krisen = subject
• er = verb
• alvorlig = complement

So it works just like English:

• The crisis is serious

This is one reason the sentence is quite beginner-friendly.

A rough pronunciation guide for an English speaker is:

KREE-sen ehr al-VOR-li

A few notes:

• kr at the start of krisen is pronounced with both sounds, similar to English kree-
• er is usually short
• alvorlig has the main stress on vor

Pronunciation varies somewhat by dialect, but this rough guide will help you recognize and say it.

It most often means serious, but depending on context it can also mean severe or grave.

For example:

• en alvorlig feil = a serious mistake
• en alvorlig sykdom = a serious illness
• Situasjonen er alvorlig = The situation is serious

So in Krisen er alvorlig, serious is the most natural translation.

That is a different sentence structure, though the meaning is related.

• Krisen er alvorlig = The crisis is serious
• Det er en alvorlig krise = It is a serious crisis / There is a serious crisis

The first talks about the crisis as something already identified. The second introduces or describes a serious crisis.

So both are correct, but they are not used in exactly the same way.