Þegar kemur að heimastuðningi vill hún hafa göngugrindina við rúmið.

Þegar kemur að is a very common Icelandic expression meaning when it comes to or as for.

Literally, it looks like when comes to, but in actual use you should learn it as a fixed phrase:

• Þegar kemur að þessu = When it comes to this
• Þegar kemur að heimastuðningi = When it comes to home support

So in this sentence, it introduces the topic: as for home support...

Because the preposition að takes the dative case.

The dictionary form is:

• heimastuðningur = home support

But after að, it changes to dative singular:

• að heimastuðningi

This is very normal in Icelandic. Many learners need to remember both the preposition and the case it requires.

So:

• kemur að heimastuðningi = comes to home support / when it comes to home support

Heimastuðningur is a compound noun:

• heima = at home
• stuðningur = support

So the compound means something like:

• home support
• support provided at home
• in-home assistance

The exact English translation depends on context, but the Icelandic word clearly refers to support or care in the home.

This is because Icelandic usually follows the verb-second rule in main clauses.

The sentence begins with a fronted phrase:

• Þegar kemur að heimastuðningi = When it comes to home support

After that opening element, the finite verb comes next:

• vill

Then the subject follows:

• hún

So:

• Þegar kemur að heimastuðningi vill hún hafa...

If you started directly with the subject, then you would get:

• Hún vill hafa...

Both patterns are normal, but once that first phrase is placed at the front, Icelandic typically puts the verb in second position.

Yes, but here it means something a bit more like:

• to have
• to keep
• to have placed
• to want something to be

So vill hún hafa göngugrindina við rúmið means she wants the walker to be there, by the bed.

It is not just about ownership. It is more about desired placement or arrangement.

Compare:

• Ég vil hafa kaffið heitt. = I want the coffee hot.
• Hún vill hafa göngugrindina við rúmið. = She wants to have the walker by the bed.

Göngugrindina is the definite accusative singular form of göngugrind.

Base word:

• göngugrind = walking frame / walker

Definite form:

• göngugrindin = the walker

In this sentence it is the direct object of hafa, so it appears in the accusative:

• göngugrindina

So the structure is:

• vill hafa göngugrindina = wants to have the walker

It is another compound noun:

• ganga = to walk
• göngu- = a combining form related to walking
• grind = frame, barrier, or rack

So göngugrind literally means something like walking frame.

That is why it can be translated as:

• walker
• walking frame

Both are good, depending on the variety of English.

Við is a preposition that often means:

• by
• next to
• at

So við rúmið means by the bed or next to the bed.

The noun is:

• rúm = bed

The definite form is:

• rúmið = the bed

So:

• við rúmið = by the bed

This is a very natural way to describe physical position beside something.

After við, the noun is in the accusative.

The word rúm is a neuter noun, and in the singular definite form, the nominative and accusative look the same:

• nominative: rúmið
• accusative: rúmið

So even though the form does not change visibly, it is still accusative because við governs the accusative.

This is something learners see often in neuter nouns: the form may stay the same even though the case changes.

Sometimes learners wonder about this because both can be translated loosely as by the bed, but they are not exactly the same.

• við rúmið means physically next to the bed
• hjá rúminu sounds less natural here if you mean exact placement of an object beside the bed

For an object like a walker, við rúmið is the normal choice because it emphasizes location right next to the bed.

So in this sentence, við rúmið is the best and most natural option.

Not really in the ordinary way. In þegar kemur að..., the verb is part of a fixed idiomatic expression.

Literally, kemur is the 3rd person singular form of koma (to come), but in this phrase you do not need to look for a clear subject like you would in a simple sentence.

It is best to learn:

• þegar kemur að X = when it comes to X

as one chunk.

That will help more than trying to force a completely literal word-for-word analysis.

The sentence breaks down like this:

• Þegar kemur að heimastuðningi = When it comes to home support
• vill hún = she wants
• hafa göngugrindina við rúmið = to have the walker by the bed

So the full structure is:

1. topic-setting phrase
2. main verb
3. subject
4. infinitive phrase with object and location

A learner-friendly gloss would be:

• When it comes to home support, she wants to have the walker by the bed.

A good shortlist would be:

• þegar kemur að = when it comes to
• heimastuðningur = home support
• vilja = to want
• hafa = to have / keep / have placed
• göngugrind = walker / walking frame
• við = by / next to
• rúm = bed

If you learn those items together with their grammar patterns, you will get much more out of the sentence than by only memorizing the translation.