Lestin fer norður í dag.

Lestin = lest + -in.

• lest = train
• -in = the definite article, so the

So Lestin means the train.

In Icelandic, the is very often attached to the noun as an ending instead of being a separate word like in English. That is why you do not see a separate word for the here.

Also, lest is a feminine noun, and -in is the definite ending used here for that form.

Because fer is the conjugated form of the verb fara.

• fara = to go
• fer = goes / is going

Here the subject is Lestin = the train, which is third person singular, so the verb must also be in the third person singular present tense:

• ég fer = I go
• þú ferð = you go
• hann/hún/það fer = he/she/it goes

So Lestin fer means the train goes.

It can cover several related ideas, depending on context.

With fara, Icelandic often uses one verb where English might choose among:

• go
• leave
• travel
• sometimes even set off

So Lestin fer norður í dag could feel like:

• The train goes north today
• The train travels north today
• The train leaves for the north today

The exact English choice depends on context, but the Icelandic verb itself is perfectly normal here.

Here norður is an adverb of direction, not a noun.

It means:

• north
• northward
• to the north

Icelandic often uses directional adverbs like this with motion verbs:

• fara norður = go north
• fara suður = go south
• fara út = go out
• fara inn = go in

So Lestin fer norður is very natural Icelandic for The train goes north.

A useful contrast is:

• norður = northward / to the north (direction)
• í norðri = in the north (location)

Because after the preposition í in this fixed expression, the noun appears as dag rather than dictionary-form dagur.

• dictionary form: dagur = day
• in the phrase í dag = today

So í dag is simply the standard Icelandic expression for today.

English speakers sometimes expect a more word-for-word structure, but this is just a common set phrase you should learn as a whole unit:

• í dag = today
• á morgun = tomorrow
• í gær = yesterday

It is in the nominative case, because it is the subject of the sentence.

In Lestin fer norður í dag:

• Lestin = the subject
• fer = the verb
• norður = directional adverb
• í dag = time expression

So Lestin is the thing doing the action, which is why it appears in the nominative.

The word order can change, but not completely freely.

The given sentence is the neutral order:

• Lestin fer norður í dag.
• The train goes north today.

You can also move the time expression to the front:

• Í dag fer lestin norður.

That is also correct, and very natural.

A key rule in Icelandic main clauses is that the finite verb usually stays in second position. This is often called the V2 rule. So if you move Í dag to the front, the verb fer still comes next, and the subject lestin moves after it.

Because Icelandic often does not need one in this kind of sentence.

In English, learners may expect something like to the north, but Icelandic commonly just uses the directional adverb directly after a motion verb:

• fara norður = go north
• not necessarily something longer like go to the north

So the structure is simpler than English may suggest.

A rough guide is:

LEST-in fer NOR-thur ee dag

A few pronunciation notes:

• Stress in Icelandic usually falls on the first syllable of each word.
• Lestin starts with les-, like less.
• fer has an e like in bed.
• ð in norður is like th in this.
• í is like ee in see.

This is only an approximation, but it is enough to help you begin saying the sentence aloud.

Yes. In many contexts, English can use either a simple present or a present progressive translation.

Icelandic fer is just the present-tense form, and English may choose:

• goes north today
• is going north today

depending on style and context.

So if you saw either English version, that would not be surprising. The Icelandic sentence itself stays the same.