Det er en dårlig unnskyldning.

Det er is a very common Norwegian pattern meaning it is, that is, or sometimes just a general statement like there is/there are, depending on context.

In Det er en dårlig unnskyldning, the most natural English rendering is often That’s a bad excuse or It’s a bad excuse.

Here, det does not have to refer to a specific neuter noun. It often works as a general subject in Norwegian.

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

So:

• å være = to be
• er = am / is / are

Examples:

• Jeg er trøtt = I am tired
• Hun er hjemme = She is at home
• Det er en dårlig unnskyldning = It/that is a bad excuse

Unnskyldning is a feminine noun, but in Bokmål, feminine nouns can often be written with either:

• ei unnskyldning
• en unnskyldning

Both are acceptable in Bokmål.

You cannot use et, because et is for neuter nouns.

So this sentence uses a very common Bokmål style where feminine nouns take en instead of ei.

Because this is an indefinite singular noun phrase:

• en dårlig unnskyldning

In Norwegian, adjectives usually take their basic form in the indefinite singular with en/ei nouns.

Compare:

• en dårlig unnskyldning = a bad excuse
• ei dårlig forklaring = a bad explanation

The -e form is used in several other situations, especially:

• plural: dårlige unnskyldninger = bad excuses
• definite forms: den dårlige unnskyldningen = the bad excuse

So dårlig is correct here.

Because the normal order in Norwegian is:

article + adjective + noun

So:

• en dårlig unnskyldning
• en stor bil
• et lite hus

This is very similar to English:

• a bad excuse
• a big car
• a small house

So the structure is quite straightforward here.

This is a very common learner question.

Det is often used in general statements like this:

• Det er sant = It is true
• Det er vanskelig = It is difficult
• Det er en dårlig unnskyldning = That’s a bad excuse

Den is more often used when you are referring back to a specific common-gender noun:

• Unnskyldningen? Den er dårlig. = The excuse? It is bad.

So in your sentence, det is the natural choice because the sentence is presented as a general judgment, not as a pronoun replacing unnskyldning.

Yes. Unnskyldning can mean both, depending on context.

In this sentence, it clearly means excuse:

• Det er en dårlig unnskyldning = That’s a bad excuse

But in another context, it can mean apology:

• Du skylder meg en unnskyldning = You owe me an apology

Related forms are also useful:

• Unnskyld! = Sorry! / Excuse me!
• å unnskylde = to excuse / forgive

Yes, you can, but it changes the feel slightly.

• Det er en dårlig unnskyldning = It/that is a bad excuse
• Dette er en dårlig unnskyldning = This is a bad excuse

Dette is more specific and more directly points to something present, just like this in English.

So if you are reacting to a specific excuse someone just gave, Dette er en dårlig unnskyldning can sound very natural.

If you want a more general or neutral statement, Det er en dårlig unnskyldning is very common.

A rough English-friendly approximation is:

deht ehr en DOHR-lee OON-shyld-ning

A few important notes:

• dårlig has å, which sounds like a long aw/o sound
• unnskyldning contains the y sound, which does not exist naturally in English; it is similar to German ü
• the skj/sh sound in unnskyldning is like sh

A more Norwegian-like pronunciation will vary by dialect, but the stressed words are usually:

dårlig and unnskyldning

So the rhythm is roughly:

Det er en DÅRlig unnskyldning

The definite version would be:

• Den dårlige unnskyldningen = the bad excuse

This shows an important Norwegian pattern called double definiteness:

• den
  • adjective + noun with definite ending

So:

• en dårlig unnskyldning = a bad excuse
• den dårlige unnskyldningen = the bad excuse

This is different from English, where you only mark definiteness once with the.