Hljóðbókin hjálpar mér að slaka á í strætó.

The audiobook helps me relax on the bus.

Breakdown of Hljóðbókin hjálpar mér að slaka á í strætó.

• strætó: the bus
• hjálpa: to help
• mér: me
• slaka á: to relax
• í: on
• hljóðbókin: the audiobook

Questions & Answers about Hljóðbókin hjálpar mér að slaka á í strætó.

Why does hljóðbókin end in -in? What does that mean?

-in is the suffixed definite article for a feminine singular noun in the nominative:

• hljóðbók = an audiobook (indefinite)
• hljóðbókin = the audiobook (definite)

So the sentence is talking about a specific audiobook (or audiobooks in general, but phrased as the one in context).

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Is hljóðbók a compound? How is the word built?

Yes. hljóðbók is a compound:

• hljóð = sound, audio
• bók = book

Compounds are extremely common in Icelandic, and the first element often modifies the second (so literally sound-book → audiobook).

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Why is it hjálpar mér and not hjálpar mig?

Because hjálpa typically takes the person being helped in the dative case, not the accusative.

• mér = dative of ég (me)
• mig = accusative of ég (me)

So Hljóðbókin hjálpar mér... is the normal Icelandic pattern: X helps me...

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How do you know hjálpar means “helps” (present tense)? What’s the verb form?

hjálpar is the 3rd person singular present tense of hjálpa:

• (ég) hjálpa = I help
• (þú) hjálpar = you help
• (hann/hún/það) hjálpar = he/she/it helps

Since hljóðbókin is 3rd person singular, you use hjálpar.

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What is að doing before slaka?

að is the common infinitive marker (often like English to):

• að slaka = to relax (in this construction)

It’s used after many verbs (including hjálpa) when the next verb is in the infinitive.

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Why is it að slaka á with á separated—can á be dropped?

You generally should not drop it here. slaka á is the normal verb+particle/preposition combination meaning to relax / take it easy.

The á stays with the verb phrase, but when you add the infinitive marker að, you get:

• að slaka á (not að slaka)

This is similar in spirit to English “relax” vs “take it easy” (where easy is part of the expression).

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Does slaka á always mean “relax,” or can it mean something else?

It can also mean loosen or ease off, depending on context. For example:

• slaka á reipinu = loosen the rope
• slaka á (without an object) often = relax, unwind

In your sentence, it’s clearly the “relax” meaning.

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Why is it í strætó? What case is strætó in here?

í usually means in/into and commonly governs dative for location (in) and accusative for movement (into). Here it’s location: in the bus, so conceptually dative.

strætó is a very common colloquial word for bus and is often used in a way that doesn’t show much visible case ending in everyday speech/writing. You’ll also see more “fully declined” options like:

• í strætónum = in the bus (with the definite form)

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Is strætó informal? Is there a more formal word for “bus”?

Yes, strætó is informal/colloquial and extremely common in Reykjavík/Icelandic daily speech (also used as the name/brand for public buses). A more formal word is strætisvagn (bus).

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What’s the basic word order here, and can it change?

The default structure is very similar to English:
Subject – Verb – Indirect object – Infinitive phrase – Prepositional phrase

• Hljóðbókin (subject)
• hjálpar (verb)
• mér (dative “me”)
• að slaka á (infinitive phrase)
• í strætó (where)

You can move elements for emphasis (Icelandic is flexible), but the verb still follows the usual verb-second tendencies in main clauses, so you can’t reorder completely freely without changing style or focus.