Ég verð sáttur þegar allt er klárt og íbúðin er hrein.

Because verða means to become (and in many contexts it also gives a future-like sense).

So:

• Ég er sáttur = I am satisfied
• Ég verð sáttur = I become / will be satisfied

In this sentence, the idea is that the satisfaction happens when the conditions are met. In natural English, that often comes out as I’ll be satisfied when..., even though Icelandic is literally using become.

Also, verð is the 1st person singular present tense of the irregular verb verða.

Yes. Grammatically, verð is present tense, but Icelandic often uses the present to talk about the future when the context makes the time clear.

So this can feel like:

• literally: I become satisfied when...
• naturally: I will be satisfied when...

The þegar clause makes the timing clear, so Icelandic does not need a separate future form here.

Because the adjective has to agree with the person speaking.

Here, sáttur is masculine singular nominative. That suggests the speaker is male.

• male speaker: Ég verð sáttur
• female speaker: Ég verð sátt

This is very common in Icelandic: adjectives agree in gender, number, and case with the noun or pronoun they describe, even after verbs like vera and verða.

Sáttur usually means something like:

• satisfied
• content
• at peace
• okay with it

In this sentence, it is closer to satisfied/content than to happy in a general emotional sense.

So it is not exactly the same as:

• glaður = happy, glad
• ánægður = pleased, satisfied

Sáttur often has a nuance of things being in order or being at peace with a situation, which fits this sentence well.

Because allt is the neuter singular form meaning everything.

It comes from allur:

• masculine: allur
• feminine: öll
• neuter: allt

In this sentence, allt is being used as a pronoun meaning everything, and Icelandic treats that as neuter singular.

That is why the adjective later is also neuter singular:

• allt er klárt

Because klárt agrees with allt.

Since allt is neuter singular, the adjective must also be neuter singular:

• allt → klárt

This is a predicate adjective, meaning it comes after er, but it still agrees with the subject.

Compare:

• hann er klár = he is ready / clever
• hún er klár
• það er klárt
• allt er klárt

It can mean both, depending on context.

Common meanings of klár include:

• ready
• finished / done
• clever / smart

In allt er klárt, it clearly means ready or done, not smart.

So here the sense is that everything is prepared / finished / in order.

Because hrein agrees with íbúðin, and íbúð is a feminine noun.

So:

• íbúðin = feminine singular nominative
• therefore: hrein = feminine singular nominative

Compare the adjective hreinn:

• masculine: hreinn
• feminine: hrein
• neuter: hreint

That is why you get:

• íbúðin er hrein = the apartment is clean

Because Icelandic usually puts the definite article onto the end of the noun instead of using a separate word like English the.

So:

• íbúð = apartment
• íbúðin = the apartment

This is one of the most noticeable differences from English. The -in ending here is the definite article attached to the feminine noun íbúð.

Because þegar introduces a subordinate clause, and subordinate clauses normally do not use the main-clause V2 word order.

So the normal order is:

• þegar allt er klárt

That is:

• conjunction
• subject
• verb
• complement

In other words, after þegar, Icelandic keeps a more straightforward clause order.

In normal Icelandic, you keep it:

• allt er klárt og íbúðin er hrein

That is because you really have two full coordinated clauses:

1. allt er klárt
2. íbúðin er hrein

Leaving out the second er would sound incomplete or unnatural in standard speech and writing. Repeating the verb is the normal pattern here.

They are nominative here.

Why?

Because:

• allt is the subject of er
• íbúðin is the subject of er
• klárt and hrein are predicate adjectives that agree with those subjects

So:

• allt → nominative neuter singular
• klárt → nominative neuter singular
• íbúðin → nominative feminine singular
• hrein → nominative feminine singular

This is a useful rule: after vera and verða, predicate adjectives usually agree with the subject in gender, number, and case.