Báturinn liggur við bryggjuna í höfninni.

In Icelandic, the definite article is usually attached to the end of the noun instead of being a separate word.

So here you get:

• bátur = boat → báturinn = the boat
• bryggja = pier/dock → bryggjuna = the pier in the accusative
• höfn = harbor → höfninni = the harbor in the dative

That is very normal Icelandic. English uses a separate word, but Icelandic often uses a noun ending.

Báturinn is the nominative singular definite form of bátur.

Breakdown:

• bátur = a boat
• báturinn = the boat

It is in the nominative here because it is the subject of the sentence: the boat is the thing doing the lying / being situated.

Yes, liggur is from the verb liggja, which literally means to lie.

In this sentence, it is used in a very natural location sense:

• The boat lies by the pier
• more natural English: The boat is by the pier / The boat is moored by the pier

Icelandic often uses liggja for things that are resting, positioned, or located somewhere. With boats, this can sound especially natural and idiomatic.

Also, liggur is 3rd person singular present tense, matching the singular subject báturinn.

Sometimes yes, but it changes the feel a little.

• Báturinn er við bryggjuna = The boat is by the pier
• Báturinn liggur við bryggjuna = The boat lies / is lying / is moored by the pier

Using liggur is often more descriptive and more idiomatic for a boat that is resting in position. It suggests a more physical, located state than the very general verb to be.

Here við means something like:

• by
• at
• alongside

So við bryggjuna means by the pier or at the pier.

A useful thing for English speakers to remember: this is not the normal word for with in the sense of with a friend. That would usually be með.

So:

• við bryggjuna = by the pier
• með vini = with a friend

Because við takes the accusative case, and the noun is also definite.

The dictionary form is:

• bryggja = pier/dock

But after við, you need the accusative form, and with the definite article attached, that becomes:

• bryggjuna = the pier in the accusative

So the ending is doing two jobs at once:

1. showing definiteness
2. showing the case required by the preposition

Because í changes case depending on meaning:

• dative for location: in
• accusative for movement into: into

Here the boat is already located in the harbor, so Icelandic uses the dative:

• í höfninni = in the harbor

If the sentence were about movement into the harbor, you would use the accusative:

• Siglingin fer í höfnina = into the harbor

So this is a very common Icelandic pattern:

• location → dative
• motion toward/into → accusative

Höfninni is the dative singular definite form of höfn.

• höfn = harbor
• höfninni = in/to/from the harbor, depending on the preposition and context

In this sentence, it is dative because it follows í in a location meaning: in the harbor.

Because the sentence is talking about specific things:

• the boat
• the pier
• the harbor

In Icelandic, each noun is marked as definite individually when needed. English also has three definite noun phrases here, but English uses the separate word the each time, while Icelandic usually adds the article to the end of each noun.

So it is completely normal to see several definite noun forms in one sentence.

No, this is a very straightforward Icelandic sentence.

Basic structure:

• Báturinn = subject
• liggur = verb
• við bryggjuna = prepositional phrase
• í höfninni = prepositional phrase

So the order is basically:

Subject + Verb + Place + Place

That is very natural.

Icelandic can move elements around for emphasis, though. For example, you could front a place phrase, and Icelandic would still keep the finite verb in second position:

• Í höfninni liggur báturinn við bryggjuna.

That sounds more marked or stylistic, but it is grammatical.

They are:

• báturinn → bátur = boat
• liggur → liggja = to lie
• bryggjuna → bryggja = pier/dock
• höfninni → höfn = harbor

This is useful because Icelandic words often appear in changed forms depending on case, number, definiteness, and verb conjugation.

Yes. For a boat, liggja við bryggju often feels quite natural and can suggest that the boat is moored, lying at the dock, or resting alongside the pier.

So although the verb literally means lie, in context it works much like an idiomatic location verb for boats. English often prefers is moored, is docked, or simply is at the pier, but Icelandic is very comfortable with liggja here.