Jeg svarer først senere, når mødet er slut.

In Danish, the present tense is very often used for future meaning when the time is understood from the context.

So Jeg svarer først senere literally looks like I answer only later, but in natural English it usually means I’ll reply later.

The word senere already shows that the action happens after now, so Danish does not need a separate future form here.

You could also say Jeg vil svare senere, but that can sound a bit more deliberate or emphatic. In everyday Danish, the present tense is very common for planned or expected future actions.

Først senere means something like not until later or only later.

Here, først does not mean first in the sense of before everything else. Instead, it adds the idea that the action will wait until a later time.

So:

• Jeg svarer senere = I’ll reply later
• Jeg svarer først senere = I won’t reply until later

That little word først makes the delay stronger.

Når is used for something that happens in the future or for something that happens repeatedly / whenever.

In this sentence, the meeting has not ended yet, so Danish uses når:

• når mødet er slut = when the meeting is over

Da is usually used for a specific event in the past:

• Da mødet var slut, svarede jeg. = When the meeting was over, I replied.

So a simple rule is:

• når = future or repeated
• da = past, one specific time

Mødet is the definite form of møde.

• et møde = a meeting
• mødet = the meeting

Danish usually adds the definite article to the end of the noun instead of putting a separate word before it.

So:

• et møde
• mødet

In this sentence, it is a specific meeting that both speaker and listener understand, so Danish uses mødet = the meeting.

Slut here is an adjective, meaning finished / over.

So mødet er slut means the meeting is over.

This is a very common expression in Danish:

• Filmen er slut = The movie is over
• Timen er slut = The lesson is over

Sluttet is the past participle of slutte, and it is used in other kinds of constructions, but in this sentence slut is the natural choice.

So think of:

• er slut = is over / is finished

rather than as a verb form like English has ended.

Because the når-clause comes after the main clause.

The sentence is:

• Jeg svarer først senere, når mødet er slut.

The main clause comes first, so it keeps normal word order:

• Jeg svarer ...

If the når-clause came first, then the main clause would have inversion:

• Når mødet er slut, svarer jeg først senere.

Notice how svarer comes before jeg in that version. That is standard Danish word order after a fronted subordinate clause.

Yes, often you can, but the nuance is slightly different.

• Jeg svarer først senere, når mødet er slut.
• Jeg svarer først senere, efter mødet.

Both are natural and both refer to replying later. But:

• når mødet er slut focuses on the time point when the meeting ends
• efter mødet means after the meeting more generally

So both work, but når mødet er slut can sound a bit more tied to the exact moment the meeting finishes.

In standard Danish, a comma is usually written before a subordinate clause, and når mødet er slut is a subordinate clause.

So the comma marks the boundary between:

• main clause: Jeg svarer først senere
• subordinate clause: når mødet er slut

This is very normal in written Danish.

Not exactly, though they can be similar in some contexts.

• svare = to answer / reply
• besvare = to answer something more directly, often a question, message, exam question, etc.

In this sentence, Jeg svarer først senere sounds very natural for replying to someone.

Jeg besvarer først senere would usually sound less natural here unless you name the thing being answered, for example:

• Jeg besvarer din mail senere.

So for a general I’ll reply later, svare is the better choice.

Yes, but the meaning or emphasis can change a little.

The original:

• Jeg svarer først senere, når mødet er slut.

is very natural.

You might also hear:

• Jeg svarer senere, når mødet er slut.
• Jeg svarer, når mødet er slut.

But with først senere, the speaker emphasizes that the reply will not come before then.

So word placement in Danish is fairly flexible in some cases, but the original version has a clear and natural rhythm:

• subject jeg
• verb svarer
• time expression først senere
• subordinate clause når mødet er slut