Við sleppum við mikla umferð ef við förum snemma.

Sleppa við is a fixed expression meaning to avoid, to get out of, or to escape having to deal with something.

So in this sentence, við sleppum við mikla umferð means we avoid heavy traffic.

This is useful to learn as a chunk:

• sleppa við eitthvað = avoid something
• sleppa við að gera eitthvað = avoid doing something

Examples:

• Ég slapp við biðröðina. = I avoided the queue.
• Við sluppum við að borga. = We avoided having to pay.

No. The two við words have different jobs.

1. Við at the beginning = we
   This is the subject pronoun.

2. við after sleppum = with/from/against as a preposition, but in this expression it is just part of the verb phrase sleppa við.

So:

• Við = we
• sleppum við = avoid

This is very common in Icelandic: the same form can be a pronoun in one place and a preposition in another.

Because sleppum is the 1st person plural present tense form of sleppa.

The subject is við = we, so the verb has to match:

• ég sleppi = I avoid/get away
• þú sleppur
• hann/hún/það sleppur
• við sleppum = we avoid
• þið sleppið
• þeir/þær/þau sleppa

So við sleppum means we avoid or we will avoid, depending on context.

Because förum is the 1st person plural present tense of fara = to go.

• ég fer
• við förum = we go

So ef við förum snemma literally is if we go early.

This is an irregular verb, so the forms are worth memorizing:

• infinitive: fara
• present singular: fer
• present plural: förum

Icelandic often uses the present tense for future meaning, just like English often does.

English:

• If we leave early, we avoid traffic.
• Tomorrow I go to town. (less common, but possible in some contexts)

Icelandic:

• Við sleppum við mikla umferð ef við förum snemma.

Even though both verbs are in the present tense, the meaning can clearly be future: We’ll avoid heavy traffic if we leave early.

So this is completely normal Icelandic usage.

Because umferð is in the accusative case here, and the adjective has to match it.

The basic dictionary form is:

• mikil umferð = heavy traffic

But after sleppa við, the noun phrase appears in the accusative:

• mikla umferð

Why?

• umferð is a feminine singular noun.
• The adjective mikill changes form to agree with gender, number, and case.
• Accusative feminine singular of mikill is mikla.

So:

• nominative: mikil umferð
• accusative: mikla umferð

It is in the accusative.

That is because the expression sleppa við takes an object in the accusative:

• sleppa við eitthvað

So here:

• mikla umferð is the object of sleppum við
• therefore umferð is accusative singular
• and the adjective also changes to accusative: mikla

A learner does not always have to predict this from logic alone; often it is best to learn the whole pattern:

• sleppa við + accusative

Here umferð means traffic.

It is a very common word in Icelandic, especially for road traffic:

• mikil umferð = heavy traffic
• lítil umferð = light traffic

In this sentence it works like an uncountable noun, much like English traffic.

Snemma is an adverb, meaning early.

It describes when we go:

• við förum snemma = we go early / we leave early

It does not change for gender, number, or case, because adverbs are invariable.

Compare:

• adjective: snemmur / snemma / snemmt in older or more limited adjective uses
• adverb: snemma = early

For everyday learning, it is best to remember:

• að fara snemma = to go early / to leave early

It has two clauses:

1. Við sleppum við mikla umferð
   Main clause: We avoid heavy traffic

2. ef við förum snemma
   Subordinate clause introduced by ef = if

So the structure is:

• [main clause] + ef + [subordinate clause]

Very literally:

• We avoid heavy traffic if we go early.

Natural English:

• We’ll avoid heavy traffic if we leave early.

Yes.

You can also say:

Ef við förum snemma, sleppum við við mikla umferð.

That means the same thing:
If we go early, we avoid heavy traffic.

Notice something important: when the ef clause comes first, the main clause follows normal Icelandic verb-second word order:

• Ef við förum snemma, sleppum við við mikla umferð.

Here:

• Ef við förum snemma takes the first position
• then the finite verb sleppum comes next
• then the subject við

This word order often surprises English speakers.

It can do both.

1. sleppa við + noun

   • Við sleppum við mikla umferð.
   • We avoid heavy traffic.

2. sleppa við að + infinitive

   • Við sleppum við að bíða.
   • We avoid waiting.
   • Hann slapp við að vinna um helgina.
   • He avoided having to work on the weekend.

So this is a very flexible and useful expression.

Yes — probably these three things:

1. sleppa við = avoid
2. sleppa við + accusative
3. Present tense can express future meaning:
   • Við sleppum ... ef við förum ... = We’ll avoid ... if we go ...

A very good chunk to memorize is:

• Við sleppum við mikla umferð ef við förum snemma.

And from it you can build similar sentences:

• Við sleppum við röð ef við komum snemma. = We avoid the line if we arrive early.
• Við sleppum við vandræði ef við undirbúum okkur vel. = We avoid trouble if we prepare well.