Við minnum hvort annað á að slökkva á straujárninu áður en við förum út.

A word-for-word breakdown is:

• Við = we
• minnum = remind
• hvort annað = each other
• á að slökkva á straujárninu = to turn off the iron
• áður en = before
• við förum út = we go out / leave

So the whole sentence means: We remind each other to turn off the iron before we go out.

Minnum is the 1st person plural present form of að minna (to remind).

Because the subject is við (we), the verb has to match it:

• ég minni = I remind
• þú minnir = you remind
• við minnum = we remind

So Við minnum ... simply means We remind ...

No. Here hvort annað is a reciprocal expression meaning each other / one another.

So:

• Við minnum hvort annað = We remind each other

This is completely different from hvort meaning whether in other contexts.

For learners, it is best to recognize hvort annað as a set expression meaning each other. Its exact form can vary depending on grammar, but in sentences like this, you can treat it as the normal way to express mutual action.

Because the two á belong to two different verb patterns:

1. minna einhvern á að + infinitive
   = to remind someone to do something

2. slökkva á einhverju
   = to turn something off

So in:

• minnum hvort annað á að...
• slökkva á straujárninu

the first á goes with minna, and the second á goes with slökkva.

They are not the same grammatical piece repeated by accident; each one is required by its own verb.

Here að is the infinitive marker, like English to in to turn off.

So:

• að slökkva = to turn off

The pattern is:

• minna einhvern á að gera eitthvað
• remind someone to do something

So Við minnum hvort annað á að slökkva... means We remind each other to turn off...

Because slökkva usually takes the preposition á when talking about turning off appliances or devices.

So Icelandic says:

• slökkva á ljósinu = turn off the light
• slökkva á sjónvarpinu = turn off the TV
• slökkva á straujárninu = turn off the iron

This is just the normal Icelandic pattern. Even though English says turn off the iron without a preposition there, Icelandic uses slökkva á + dative.

Because slökkva á requires the dative case.

The noun is straujárn (iron). Its definite forms include:

• straujárnið = the iron in the nominative/accusative
• straujárninu = the iron in the dative

Since the verb phrase is slökkva á einhverju, the noun after á has to be dative:

• á straujárninu

The -inu ending is the clue that you are seeing dative singular definite.

Because the sentence is talking about a specific iron that both speakers already know about, probably the one at home.

In Icelandic, just like in English, the definite form is used when the thing is identifiable in context. So:

• straujárn = an iron / iron
• straujárnið / straujárninu = the iron

In a sentence about a household routine, the iron is the natural choice.

It means before we go out or before we leave.

• áður en = before
• við förum = we go
• út = out

This is a subordinate clause introduced by áður en. Icelandic keeps its own subject inside that clause, so it says áður en við förum út, not just áður en förum út.

Yes, literally it is go out / go outside, but in everyday use it often means leave the house or go out in a practical sense.

So in this sentence:

• áður en við förum út

most naturally means something like before we leave or before we go out of the house.

The little word út is a very common directional particle in Icelandic and often combines with verbs like fara.

You could say that, but it is not exactly the same.

• Við minnum hvort annað á að... = We remind each other to...
• Við minnum okkur á að... = We remind ourselves to...

The first one emphasizes a mutual action between people in the group. The second sounds more like the group collectively reminding itself.

So in this sentence, hvort annað is the best choice because the idea is clearly mutual reminding.