Denne artikel er mere interessant end den anden, men den er også mere kompliceret.

Denne means this.

So denne artikel = this article.

In Danish, denne is used with a singular common-gender noun. Since artikel is a common-gender noun, denne is the correct form.

A quick comparison:

• denne artikel = this article
• dette brev = this letter
• disse artikler = these articles

So the form changes depending on the gender and number of the noun.

Because artikel is a common-gender noun, not a neuter noun.

Danish has two grammatical genders:

• common gender → usually takes en
• neuter → usually takes et

Since the word is en artikel, it is common gender, so you use:

• denne artikel = this article

If it were a neuter noun, you would use dette instead:

• dette hus = this house

In Danish, many adjectives form the comparative with mere = more, especially longer or more formal adjectives.

So:

• interessant → mere interessant = more interesting
• kompliceret → mere kompliceret = more complicated

This works very much like English more interesting and more complicated.

Some shorter adjectives do take an ending instead:

• stor → større = bigger
• gammel → ældre = older

So Danish uses both methods, depending on the adjective.

End means than in comparisons.

So:

• mere interessant end den anden = more interesting than the other one

This is the normal word used after a comparative in Danish:

• større end = bigger than
• bedre end = better than
• hurtigere end = faster than

A very common learner mistake is to confuse end with og or other linking words, but in comparisons end is specifically than.

Den anden means the other one or the second one, depending on context.

Here, anden is an adjective meaning other/second, and it is used with den because the noun is understood but left out.

So the full idea is something like:

• den anden artikel = the other article

But because artikel has already been mentioned, Danish can leave it out:

• den anden = the other one

This is very natural in Danish.

That den means it.

It refers back to denne artikel.

So the structure is:

• Denne artikel = This article
• den = it

Danish often uses den or det as pronouns for it, depending on the gender of the noun being referred to.

Because artikel is common gender, the pronoun is den.

For a neuter noun, you would usually use det instead.

Også means also.

In this sentence, it comes before the thing being added:

• den er også mere kompliceret = it is also more complicated

This placement is very normal in Danish. It is similar to English also placed before the adjective phrase.

Compare:

• Den er også dyr. = It is also expensive.
• Den er også meget lang. = It is also very long.

You may also hear different placements in other sentence types, but here den er også ... is the standard, natural order.

Both clauses here use normal main clause word order in Danish:

• Denne artikel er mere interessant ...
• den er også mere kompliceret

In a main clause, the verb usually comes in the second position. This is often called the V2 rule.

In the first clause:

• first element: Denne artikel
• verb: er

In the second clause:

• first element: den
• verb: er

The conjunction men = but simply links two main clauses. It does not force subordinate-clause word order.

So this is correct:

• ..., men den er også mere kompliceret.

Not:

• ..., men den også er mere kompliceret.

Because after mere, the adjective normally stays in its base form.

So you get:

• mere interessant
• mere kompliceret

You do not add extra agreement endings just because the adjective is comparative.

This is similar to English:

• more interesting
• more complicated

The comparison is carried by mere, not by changing the adjective itself.

Yes, you could also say den her artikel.

Both can mean this article, but the tone is a little different:

• denne artikel often sounds a bit more written, formal, or careful
• den her artikel is very common in everyday spoken Danish

So both are correct, but denne artikel fits very well in written language.

Because men joins two clauses:

• Denne artikel er mere interessant end den anden
• den er også mere kompliceret

In standard Danish writing, a comma is normally used before men when it links clauses like this.

So the comma helps show the division between the two parts:

• first idea: this article is more interesting
• second idea: but it is also more complicated

Yes, in some contexts Danish can omit repeated words, but men den er også mere kompliceret is the full and clear version.

If you say:

• Denne artikel er mere interessant end den anden, men også mere kompliceret

that can still be understood, because the missing den er is implied. However, the full version sounds more complete and is often better for learners to model.

So:

• men den er også mere kompliceret = full, explicit
• men også mere kompliceret = shorter, more elliptical

Both are possible, but the original sentence is especially clear and natural.