Indsigelsesfristen er kort.

Because Danish normally writes compound nouns as a single word.

Here, Indsigelsesfristen is built from:

• indsigelse = objection
• frist = deadline / time limit

So indsigelsesfrist means something like objection deadline or time limit for objections.

Then -en is added at the end to make it definite:

• indsigelsesfrist = an objection deadline
• indsigelsesfristen = the objection deadline

This is very common in Danish.

That -s- is a linking sound used in many Danish compounds.

So:

• indsigelse
  • frist would be awkward
• Danish instead uses indsigelsesfrist

This linking -s- does not usually add meaning by itself. It just helps join the parts of the compound in a natural way.

You will see this in many words, for example:

• arbejdsdag = workday
• livsglæde = joy of life
• sproghistorie does not use -s-, so it is not automatic in every compound

So the safest approach is to learn compounds as whole words.

Because -en is the definite ending for many Danish nouns.

In English, you usually put the before the noun:

• the deadline

In Danish, the definite article is often attached to the end of the noun:

• en frist = a deadline
• fristen = the deadline

With a compound noun, the ending goes on the whole compound:

• en indsigelsesfrist = an objection deadline
• indsigelsesfristen = the objection deadline

Because Danish often expresses the as a suffix, not as a separate word.

So instead of:

• the objection deadline

Danish says:

• indsigelsesfristen

This is the normal pattern for a simple definite noun.

A separate definite word like den is used in other situations, especially with an adjective before the noun:

• den korte indsigelsesfrist = the short objection deadline

But in your sentence, there is no adjective inside the noun phrase, so the suffix alone is enough:

• indsigelsesfristen

It is an en-word:

• en frist
• fristen

That is why the definite form ends in -en, not -et.

A useful rule is that in a compound noun, the last part decides the gender and the definite ending. Since the last part here is frist, the whole compound behaves like en frist:

• en indsigelsesfrist
• indsigelsesfristen

Er is the present tense of at være = to be.

So:

• jeg er = I am
• du er = you are
• den er = it is

In this sentence:

• Indsigelsesfristen er kort = The objection deadline is short

This is a very basic Danish sentence pattern:

• subject + er + adjective

Because kort is the correct predicative adjective form here.

In this sentence, kort comes after er, so it is a predicate adjective:

• Fristen er kort = The deadline is short

After er, Danish adjectives do not take the same form they would take before a definite noun.

Compare:

Before the noun:

• en kort frist = a short deadline
• den korte frist = the short deadline

After the noun with er:

• fristen er kort = the deadline is short
• fristerne er korte = the deadlines are short

So korte would be used in the plural here, not in the singular.

Also, kort is one of those adjectives whose singular form already ends in -t, so it looks the same in common and neuter singular:

• en kort frist
• et kort svar

No, this is straightforward main-clause word order.

The structure is:

• Indsigelsesfristen = subject
• er = verb
• kort = predicate adjective

So it is basically the same pattern as English:

• The deadline is short

Danish main clauses often follow verb-second word order, but in a simple sentence like this, that just gives you:

• subject + verb + rest

Not exactly.

Frist usually means a deadline, time limit, or allowed window of time for doing something.

So indsigelsesfristen is not just any period of time. It is specifically the time limit within which someone can object.

Depending on context, English might translate it as:

• the objection deadline
• the time limit for objections
• the objection period

But frist usually feels more like a formal limit than a neutral word like periode.

Yes, absolutely. That is a very natural alternative.

It means nearly the same thing:

• Indsigelsesfristen er kort
• Fristen for indsigelser er kort

The compound version is more compact and often sounds more formal or administrative. The for version may feel easier to understand when you are learning Danish.

So both are useful:

• indsigelsesfrist = compact compound noun
• frist for indsigelser = more transparent phrase

In Danish, common nouns are not capitalized.

So:

• en frist
• en indsigelse
• indsigelsesfristen

The only reason Indsigelsesfristen starts with a capital letter here is that it is the first word of the sentence.

This is different from German, where all nouns are capitalized. Danish does not do that.