Truflunin var stutt, svo við héldum áfram.

Because -in is the suffixed definite article in Icelandic.

• truflun = interruption / disturbance
• truflunin = the interruption / the disturbance

Icelandic usually puts the at the end of the noun rather than using a separate word like English does.

In this sentence, truflunin is the subject, and it is in the nominative singular.

Yes. Truflun is a feminine noun, and that matters because adjectives often have to agree with the noun in gender, number, and case.

So in:

• Truflunin var stutt

the adjective stutt matches truflunin.

Because stutt is the correct form of stuttur for a feminine singular nominative subject in this kind of sentence.

The adjective is being used predicatively, after var (was), and it agrees with truflunin:

• masculine: stuttur
• feminine: stutt
• neuter: stutt

So truflunin var stutt is grammatically correct.

Var is the past tense singular form of vera (to be).

So:

• er = is
• var = was

Since truflunin is singular and the sentence is in the past, var is the right form.

Here svo means so in the sense of therefore / as a result.

So the sentence structure is:

• Truflunin var stutt = the interruption was short
• svo við héldum áfram = so we continued

Be aware that svo can also mean other things in other contexts, especially then in everyday speech.

Because here svo is acting as a conjunction meaning so, joining two clauses.

That means the second clause keeps normal word order:

• við héldum áfram = we continued

If you said:

• Svo héldum við áfram

that would more naturally sound like Then we continued, where svo is functioning more like an adverb at the beginning of the clause and triggers the usual Icelandic verb-second pattern.

So:

• ..., svo við héldum áfram = ..., so we continued
• Svo héldum við áfram = Then we continued

Héldum is the 1st person plural past tense of halda (to hold, but also to keep / continue in some expressions).

Here it goes with við (we):

• ég hélt = I continued / held
• við héldum = we continued / held

This is not a fully regular verb, so the vowel changes:

• infinitive: halda
• past singular: hélt
• past plural: héldum

Áfram means onward / on / ahead, but with halda it forms the common expression:

• halda áfram = to continue / carry on

So héldum áfram means we continued.

This is a very common fixed combination in Icelandic, and it is worth learning as a unit.

Because the sentence contains two clauses:

• Truflunin var stutt
• svo við héldum áfram

The comma helps separate them. This is very natural in Icelandic writing when one clause leads into another with a conjunction like svo.

It could, but it would sound much more marked or literary. The normal, neutral order is:

• Truflunin var stutt

That is the most natural way to say it in everyday Icelandic.

Very often, yes. Halda áfram is one of the most common ways to express continue in Icelandic.

Examples:

• Við héldum áfram. = We continued.
• Hann hélt áfram að tala. = He continued talking.
• Eigum við að halda áfram? = Shall we continue?

So this sentence uses a very standard and natural expression.