Abonnementsvilkårene er klare.

Because Danish normally writes compound nouns as a single word.

So:

• abonnement = subscription
• vilkår = terms / conditions

Together, they become abonnementsvilkår = subscription terms / subscription conditions.

This is very common in Danish. Where English often uses several words, Danish often combines them into one noun.

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

So the structure is roughly:

• abonnement
• • s
• • vilkår

This gives abonnementsvilkår.

The -s- does not usually have a separate meaning by itself here; it just helps connect the parts in a natural Danish way. English learners often notice this because English does not do this as often in compounds.

Because Danish often puts definiteness at the end of the noun instead of using a separate article.

Here:

• vilkår = terms / conditions
• vilkårene = the terms / the conditions

So abonnementsvilkårene already includes the idea of the subscription terms.

That is why you do not need a separate word like English the before it.

-ne is the definite plural ending here.

So:

• vilkår = terms / conditions
• vilkårene = the terms / the conditions

In this sentence, the noun is plural and definite, so -ne is the correct ending.

A useful comparison:

• singular indefinite: et vilkår = a term / a condition
• singular definite: vilkåret = the term / the condition
• plural indefinite: vilkår = terms / conditions
• plural definite: vilkårene = the terms / the conditions

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

So:

• jeg er = I am
• du er = you are
• det er = it is
• de er = they are

In Abonnementsvilkårene er klare, er simply means are.

Because the adjective agrees with a plural noun.

Here, abonnementsvilkårene is plural, so the adjective takes the plural/definite form klare.

Compare:

• Vilkåret er klart = The term is clear
• Vilkårene er klare = The terms are clear

Also:

• klar is often used with singular common-gender nouns
• klart is often used with singular neuter nouns
• klare is used with plural nouns and also with definite forms in many contexts

So in this sentence, klare is the expected form.

Here it is plural.

That can be confusing because vilkår looks the same in singular indefinite and plural indefinite in many contexts:

• et vilkår = a term / condition
• flere vilkår = several terms / conditions

The definite ending makes it clear here:

• vilkårene = the terms / conditions

So abonnementsvilkårene definitely refers to more than one term or condition.

A singular version would be:

• Abonnementsvilkåret er klart.

That means The subscription term/condition is clear.

Notice the changes:

• vilkårene → vilkåret for singular definite
• klare → klart because vilkår is a neuter noun in the singular

So the plural sentence and singular sentence are:

• Abonnementsvilkårene er klare.
• Abonnementsvilkåret er klart.

The word order is the standard Danish pattern for a simple statement:

• subject: Abonnementsvilkårene
• verb: er
• complement: klare

So it follows the basic pattern:

subject + verb + adjective

This is very similar to English:

• The subscription terms are clear.

Danish is often quite straightforward in simple main clauses like this.

A careful pronunciation would be roughly something like:

• abonnementsvilkårene: ah-bo-NEM-ents-vil-KO-re-ne
• er: often a very short, weak sound, almost like air or uh depending on the speaker
• klare: KLA-re

A few useful notes:

• Danish pronunciation is often softer and less fully pronounced than spelling suggests.
• r sounds can be quite different from English r.
• Unstressed syllables are often reduced.
• In natural speech, er may sound very light.

If you are learning to say it, it is often best to hear native audio rather than rely only on spelling.

Yes, that is possible, but it is not exactly the same nuance.

• klare often means clear, easy to understand, or unambiguous
• tydelige often means clear in the sense of easy to see/hear/notice

So for terms and conditions, klare is very natural because it suggests that the wording or rules are understandable.

That makes Abonnementsvilkårene er klare a very natural sentence.