Svarið olli mér vonbrigðum.

Literally, it means something like The answer caused me disappointments.

More natural English is:

• The answer disappointed me
• I was disappointed by the answer

Icelandic often uses a cause + disappointment structure where English would simply use disappoint.

Svarið is the definite singular form of svar, which means answer.

Breakdown:

• svar = answer
• -ið = the definite article for a neuter noun here, so the answer

So:

• svar = an answer / answer
• svarið = the answer

In this sentence, svarið is the subject.

In Icelandic, the definite article is usually attached to the end of the noun rather than written as a separate word.

So instead of:

• the answer

you often get:

• svarið

This is very common in Icelandic.

Olli is the past tense of the verb valda, which means to cause.

So:

• valda = to cause
• olli = caused

A present-tense version of the sentence would be:

• Svarið veldur mér vonbrigðum.
• The answer causes me disappointment / disappoints me.

This is a useful verb to learn because it appears in many expressions.

Because valda is a strongly irregular verb.

Its forms are not built in a simple predictable way from the infinitive:

• infinitive: valda
• present: veldur
• past: olli

So olli just has to be learned as part of the verb’s pattern.

Because the verb valda takes the dative case, not the accusative.

So Icelandic says:

• valda mér ... = cause me ...

not:

• valda mig ...

Here mér is the dative form of ég:

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

Since valda requires dative, mér is the correct form.

Because vonbrigði is in the dative plural here, giving vonbrigðum.

This happens for two reasons:

1. valda governs the dative
2. vonbrigði is normally used as a plural-only noun

So the sentence uses:

• vonbrigðum = disappointment in the required dative plural form

This is a very common fixed expression:

• valda einhverjum vonbrigðum = to disappoint someone

That is just how Icelandic expresses the idea.

Vonbrigði is usually treated as a plural noun, even when English would use singular disappointment.

So Icelandic often says something closer to:

• cause someone disappointments

where English would normally say:

• disappoint someone
• cause someone disappointment

This is one of those places where it is better to learn the whole expression rather than translate word for word.

Yes, very much so.

Valda einhverjum vonbrigðum is a standard Icelandic way to say:

• to disappoint someone

So it is helpful to learn it as a chunk:

• það olli mér vonbrigðum = that disappointed me
• þú veldur mér vonbrigðum = you disappoint me
• svarið olli mér vonbrigðum = the answer disappointed me

Yes. Svar usually means answer, but depending on context, English might also use:

• response
• reply

So possible translations include:

• The answer disappointed me
• The response disappointed me
• The reply disappointed me

The best English choice depends on the situation.

Here svarið is nominative singular definite, because it is the subject of the sentence.

So the structure is:

• Svarið = subject
• olli = verb
• mér = indirect object / experiencer in dative
• vonbrigðum = dative complement

Even though svarið looks the same in nominative and accusative, in this sentence its role is clearly that of the subject.

Because valda can take dative complements.

In this expression:

• mér = the person affected
• vonbrigðum = the disappointment caused

Both appear in the dative with valda.

So the pattern is:

• X veldur Y vonbrigðum
• X causes Y disappointment
• more naturally: X disappoints Y

Not completely. Icelandic word order is flexible, although there are rules about the verb position.

The most neutral order here is:

• Svarið olli mér vonbrigðum.

But other orders are possible for emphasis, for example:

• Mér olli svarið vonbrigðum.

That could put more focus on me.

Still, for a learner, the original order is the safest and most natural one to use first.

You would usually say:

• Svarið veldur mér vonbrigðum.

That means:

• The answer disappoints me
• The answer is disappointing to me

So:

• olli = past tense, caused
• veldur = present tense, causes

A rough learner-friendly guide would be:

• SVA-rið OTL-li myer VON-brih-gðum

A few points:

• ð is often a soft sound, somewhat like th in this, though in some positions it is very weak
• é in mér sounds like yeh or myeh
• ll in olli has a special Icelandic pronunciation and may not sound like ordinary English l
• vonbrigðum is the trickiest word; listen to native audio if you can

For pronunciation, this is definitely a sentence worth hearing rather than relying only on spelling.

Yes. A very common alternative is:

• Ég varð fyrir vonbrigðum með svarið.

That means:

• I was disappointed with the answer

Another possibility is:

• Svarið var mér vonbrigði.

But Svarið olli mér vonbrigðum is a perfectly normal and idiomatic sentence, especially if you want the structure The answer disappointed me.