Hvis du er usikker, kan du skifte din adgangskode og prøve igen i morgen.

Hvis means if and introduces a condition.

So:

• Hvis du er usikker = If you are unsure

This is a subordinate clause, setting up the condition for the main clause that follows.

This is a very common Danish word-order pattern.

In the Hvis-clause, the word order is normal for a subordinate clause:

• Hvis du er usikker
• if you are unsure

But in the main clause, Danish uses verb-second word order. Since the whole Hvis-clause comes first, it takes the first position, so the finite verb of the main clause must come next:

• kan du skifte din adgangskode ...

If the main clause stood alone, it would usually be:

• Du kan skifte din adgangskode.

So the fronted conditional clause causes the inversion.

The comma separates the conditional subordinate clause from the main clause:

• Hvis du er usikker, kan du ...

In Danish, this is standard punctuation when a subordinate clause comes before the main clause.

Usikker is an adjective meaning unsure, uncertain, or sometimes not confident.

In this sentence, it means something like:

• unsure whether something is correct
• uncertain about what to do
• not fully confident

It is describing du after the verb er, so it works like a predicate adjective:

• du er usikker = you are unsure

Because after er in a sentence like this, the adjective is used as a predicate adjective, and it stays in its basic form:

• du er usikker

Compare that with an attributive use, where it may change depending on gender/number:

• en usikker bruger = an unsure user
• et usikkert svar = an uncertain answer

But after være/to be, the basic form is normal here.

Here kan is best understood as can in the sense of it is possible / you are able / you may.

So:

• kan du skifte din adgangskode = you can change your password

In context, it sounds like practical advice or an available option, not necessarily physical ability.

Skifte often means change, switch, or replace.

For passwords, Danish commonly uses skifte adgangskode or similar expressions. It gives the idea of replacing the old password with a new one.

A learner might expect ændre, which also means change, and that can sometimes be used too, but skifte is very natural here.

Because adgangskode is a common-gender noun in Danish:

• en adgangskode

For common-gender singular nouns, the possessive is:

• din

For neuter singular nouns, it would be:

• dit

So:

• din adgangskode = your password

Because Danish writes compound nouns as one word.

Here:

• adgang = access
• kode = code

Together:

• adgangskode = password / access code

This is very normal in Danish. English often writes similar ideas as separate words, but Danish usually combines them.

Because after a modal verb like kan, Danish normally uses the infinitive without at:

• kan skifte
• kan prøve

This is just like English:

• can change
• can try

not can to change or can to try

Because the second infinitive verb is coordinated with the first one by og:

• kan du skifte din adgangskode og prøve igen i morgen

Both skifte and prøve depend on the same kan and the same subject du.

So the sentence means:

• you can change your password and try again tomorrow

Danish does not need to repeat du kan here.

Igen means again.

It goes with prøve:

• prøve igen = try again

So the sequence:

• prøve igen i morgen

means:

• try again tomorrow

I morgen means tomorrow, and putting it at the end is a very natural place for a time expression in Danish.

So:

• prøve igen i morgen

is a normal way to say:

• try again tomorrow

You could move time expressions around in some contexts, but the end position is simple and idiomatic here.

Because in Danish, i morgen is the standard spelling for tomorrow as an adverbial expression.

Literally, it comes from in the morning, but in modern usage it simply means tomorrow.

So:

• i morgen = tomorrow

Even though English writes tomorrow as one word, Danish writes i morgen as two words.

The sentence has this structure:

• Hvis du er usikker
  conditional subordinate clause

• kan du skifte din adgangskode og prøve igen i morgen
  main clause

A useful pattern to remember is:

• Hvis + subject + verb ..., finite verb + subject + rest

So this sentence is a good example of:

1. a condition introduced by hvis
2. a main clause with verb-second word order
3. two infinitive verbs linked by og

Grammatically, usikker can sometimes resemble English insecure, but in this sentence unsure or uncertain is much better.

English insecure often refers to low self-confidence or emotional insecurity, while Danish usikker very often just means:

• not sure
• uncertain
• doubtful

So in this context, If you are unsure is the natural translation.