Hjertet er stærkt.

Hjerte means heart, and it is a neuter noun: et hjerte = a heart.

In Danish, the is often added to the end of the noun instead of being a separate word:

• et hjerte = a heart
• hjertet = the heart

Because hjerte already ends in -e, the definite ending appears as just -t here: hjerte + t = hjertet.

You usually have to learn Danish nouns together with their article: en or et.

Hjerte is a neuter noun, so it takes et:

• et hjerte = a heart

This matters because the gender affects other words too, especially adjectives:

• et stærkt hjerte
• hjertet er stærkt

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

Some common forms are:

• at være = to be
• er = am / is / are
• var = was / were

So Hjertet er stærkt is simply using the present tense: The heart is strong.

Because hjerte is a neuter singular noun.

In Danish, adjectives often agree with the noun they describe, even when they come after er. The basic form is stærk, but the neuter singular form is stærkt.

Compare:

• en mand er stærk = a man is strong
• et hjerte er stærkt = a heart is strong

This is different from English, where strong stays the same.

A useful pattern is:

• stærk for common gender singular
  
  • en stærk mand
• stærkt for neuter singular
  
  • et stærkt hjerte
• stærke for plural and for definite phrases with adjectives
  
  • stærke hjerter
  • det stærke hjerte

The same agreement appears after er:

• manden er stærk
• hjertet er stærkt
• hjerterne er stærke

Yes. This sentence follows a very familiar pattern:

• Hjertet = subject
• er = verb
• stærkt = adjective/complement

So it matches English very closely: The heart is strong.

A helpful rule is that in Danish main clauses, the finite verb normally comes in second position.

Two common pronunciation points are:

• hj- at the start of hjertet is usually pronounced like Danish j, which sounds roughly like English y in yes. The h is not pronounced.
• æ is a vowel sound that does not match English exactly. As a rough starting point, learners often compare it to the vowel in cat, though it is not exactly the same.

As with many Danish words, listening to native audio is very helpful, especially for words like hjertet and stærkt.

With a noun by itself, Danish usually adds the definite ending directly to the noun:

• hjertet = the heart

But if there is an adjective before the noun, Danish normally uses a separate definite article as well:

• det stærke hjerte = the strong heart

So:

• hjertet er stærkt = the heart is strong
• det stærke hjerte = the strong heart

It can be both.

Depending on context, hjertet can mean:

• the physical heart
• the emotional or symbolic heart
• the central part of something

So Hjertet er stærkt could sound medical, poetic, or metaphorical depending on the situation.