Hann trúir á sálina.

Trúir is the 3rd person singular present tense of the verb trúa.

So:

• ég trúi = I believe
• þú trúir = you believe
• hann/hún/það trúir = he/she/it believes

In this sentence, hann trúir means he believes.

Because Icelandic makes an important distinction:

• trúa einhverjum/einhverju = to believe someone/something, or trust someone/something
• trúa á einhvern/eitthvað = to believe in someone/something

So:

• Hann trúir henni. = He believes her.
• Hann trúir á hana. = He believes in her.

In your sentence, trúir á sálina means believes in the soul, not just believes the soul.

Because trúa á takes the accusative case, and sálina is the accusative singular definite form of sál.

Here are the key forms:

• sál = soul
• sálin = the soul (nominative)
• sálina = the soul (accusative)

Since the verb phrase is trúa á + accusative, Icelandic uses sálina.

It shows two things at once:

1. definiteness: it means the
2. case: here, accusative singular

Icelandic usually attaches the definite article to the end of the noun instead of using a separate word like English the.

So:

• sál = soul
• sálin = the soul
• sálina = the soul (in the accusative form)

Not literally. Although á often means on, prepositions in Icelandic also appear in fixed verb expressions.

With trúa, the combination trúa á means believe in.

So in this sentence, á is part of the expression, not a literal spatial on.

This is very common in Icelandic: a verb + preposition combination often has to be learned as a unit.

Because in trúa á, the preposition á is part of a fixed construction that requires the accusative.

You may already know that Icelandic prepositions can take different cases depending on meaning, but with many verb-preposition combinations, the case is simply something you must memorize with the expression.

So it is best to learn this as:

• trúa á + accusative = believe in

That is why it is á sálina, not á sálinni.

Because Icelandic article usage does not always match English exactly.

In Icelandic, the definite form can be used for a general, well-known concept, not only for one specific object in a concrete situation. So sálina can refer to the soul as a recognized idea or concept.

English and Icelandic do not always line up word-for-word with articles, so it is best to learn the phrase as Icelandic naturally says it.

This is the normal, neutral word order:

• Hann = subject
• trúir = verb
• á sálina = prepositional phrase

So the sentence follows ordinary subject–verb–rest order.

Icelandic word order can change for emphasis, but this version is the most straightforward and natural one for a basic statement.

A rough guide is:

• Hann = roughly hahn
• trúir = roughly TROO-ir
• á = roughly ow
• sálina = roughly SAU-li-na

A few useful points:

• Icelandic stress usually falls on the first syllable of each word.
• ú is a long oo sound.
• á is pronounced roughly like ow in cow.
• The accents in Icelandic mostly affect vowel sound/quality, not stress.

So the rhythm is roughly:

HANN TRÚ-ir á SÁ-li-na

The dictionary form is sál, a feminine noun meaning soul.

Its common singular forms are:

• sál = soul
• sál = soul (accusative indefinite; same form here)
• sálar = of a soul
• sál = to/from a soul

And with the definite article:

• sálin = the soul
• sálina = the soul (accusative)
• sálarinnar = of the soul
• sálinni = to/from the soul

So in your sentence, you are seeing the accusative definite singular form.