Dækningen bliver værre.

Because -en makes the noun definite singular.

• dækning = coverage, reception, signal, coverage area, etc. in a general sense
• dækningen = the coverage

Danish usually adds the definite article to the end of the noun instead of putting a separate word in front, unlike English.

So:

• en dækning = a coverage
• dækningen = the coverage

Here, the sentence is talking about a specific coverage situation, so dækningen is natural.

Dækning can mean different kinds of coverage, depending on context. Common possibilities are:

• mobile signal / reception
• network coverage
• insurance coverage
• media coverage

In a sentence like Dækningen bliver værre, many learners will most often meet it in the sense of signal/reception/coverage getting worse, but the exact meaning depends on the situation.

Bliver is from blive, which often means become or get.

So:

• Dækningen er værre = the coverage is worse
• Dækningen bliver værre = the coverage is becoming / getting worse

Using bliver shows a change over time. It means the situation is worsening, not just that it is bad.

Værre is the comparative form of dårlig.

The forms are:

• dårlig = bad
• værre = worse
• værst = worst

This is an irregular pattern, so it does not follow the most common comparative pattern.

For example:

• Det er dårligt = it is bad
• Det bliver værre = it is getting worse
• Det er værst om aftenen = it is worst in the evening

Because Danish normally uses the special comparative form værre, not mere dårlig.

Just like English says worse instead of more bad, Danish says værre instead of mere dårlig.

So the natural form is:

• Dækningen bliver værre

not:

• Dækningen bliver mere dårlig

It is best understood here as an adjective complement describing the subject dækningen.

In other words, it tells you what the coverage is becoming:

• dækningen = subject
• bliver = becomes / gets
• værre = worse

This is similar to English in:

• The coverage gets worse

So værre describes the condition of dækningen.

This is normal Danish main clause word order:

• Dækningen = subject
• bliver = verb
• værre = complement

Danish is a V2 language, which means the finite verb normally comes in the second position in main clauses.

Here the subject comes first, so the verb follows it:

• Dækningen bliver værre

If you started with another element, the verb would still stay second:

• Nu bliver dækningen værre = now the coverage is getting worse

Yes. That is often a very natural translation.

Bliver can often correspond to:

• becomes
• gets

So:

• Dækningen bliver værre = The coverage becomes worse
• Dækningen bliver værre = The coverage gets worse

In everyday English, gets worse is often the most natural rendering.

A rough learner-friendly guide is:

• dækningen ≈ DEK-ning-en

A few pronunciation notes:

• æ sounds somewhat like the vowel in English bed, though not exactly the same
• -ng- in -ning is like the ng sound in sing
• the final -en is usually unstressed and reduced

So the stress is mainly near the beginning of the word.

A rough guide is:

• værre ≈ VAIR-uh or VEHR-uh

Important points:

• æ is a front vowel, somewhat like the vowel in bed, but Danish pronunciation can be tricky
• the rr is not pronounced like a strong English r
• the final -e is weak

You do not need to pronounce it like English worse at all; the spelling and sound are completely different.

Yes. Blive is a very common verb and can mean different things depending on context.

Common uses include:

• become / get
  
  • Det bliver koldt = it is getting cold
• remain / stay
  
  • Bliv her = stay here
• part of the passive voice
  
  • Han blev set = he was seen

In Dækningen bliver værre, it clearly means becomes / gets.

You would usually say:

• Dækningen blev værre = the coverage got worse / became worse

Here:

• bliver = present tense
• blev = past tense

So the pattern is:

• Det bliver værre = it is getting worse
• Det blev værre = it got worse

Yes, absolutely. It sounds natural and idiomatic.

It works especially well in situations like:

• weak mobile reception
• internet coverage dropping
• some kind of service or signal coverage deteriorating

A Dane might also say similar things such as:

• Signalet bliver værre = the signal is getting worse
• Forbindelsen bliver værre = the connection is getting worse

So Dækningen bliver værre is a perfectly normal sentence.