Framtíðarheimilið er tilbúið.

Because Icelandic uses compound nouns very freely.

Framtíðarheimilið can be broken into:

• framtíðar- = future / of the future
• heimili = home
• -ið = the

So Icelandic packs into one word what English often expresses with several words, such as the future home or the home of the future, depending on context.

It comes from framtíð, meaning future.

In the compound, it appears as framtíðar-, which is based on the genitive form framtíðar. Icelandic often uses this kind of form in compounds to mean something like:

• of the future
• future-
• related to the future

So framtíðarheimili is literally something like future’s home or home of the future, but in natural English you would not translate it that mechanically.

That -ið is the definite article, meaning the.

Unlike English, Icelandic usually adds the to the end of the noun instead of putting it in front.

• heimili = home
• heimilið = the home

Since this is a compound noun, the article is added to the very end of the whole word:

• framtíðarheimili = future home / home of the future
• framtíðarheimilið = the future home / the home of the future

It is:

• neuter
• singular
• nominative in this sentence

Why?

• The head noun is heimili, and heimili is neuter
• It is singular because it refers to one home
• It is nominative because it is the subject of the sentence

A useful rule: in Icelandic compounds, the grammatical gender usually comes from the last part of the compound, not the first.

Er means is.

It is the present tense, third-person singular form of vera, which means to be.

So:

• vera = to be
• er = is

This is one of the most common verbs in Icelandic.

Because the adjective has to agree with the noun.

The adjective is based on tilbúinn, meaning ready. Its form changes for gender and number:

• tilbúinn = masculine singular
• tilbúin = feminine singular
• tilbúið = neuter singular

Since Framtíðarheimilið is neuter singular, the correct form is tilbúið.

Also, after vera (to be), Icelandic predicate adjectives still agree with the subject:

• Hann er tilbúinn = He is ready
• Hún er tilbúin = She is ready
• Það er tilbúið = It is ready

So here:

• Framtíðarheimilið er tilbúið

No. Icelandic does not capitalize all nouns.

Framtíðarheimilið is capitalized here only because it is the first word of the sentence.

So this is different from German. In Icelandic, ordinary nouns like heimili are normally written with a lowercase letter unless they begin a sentence or are part of a proper name.

A rough English-friendly approximation is:

FRAHM-tee-thar-hay-mi-lith er TIL-boo-ith

A few pronunciation notes:

• á, í, ú are vowel letters, not separate syllable markers
• ð is usually like the th in this, though often softer
• Icelandic usually stresses the first syllable of the word

So the strongest stresses are on:

• FRAM- in Framtíðarheimilið
• TIL- in tilbúið

Yes, in this sentence it is very similar to English:

• Framtíðarheimilið = subject
• er = verb
• tilbúið = adjective complement

So the pattern is:

subject + is + adjective

That said, Icelandic word order can change more than English word order in other sentence types. Icelandic often follows a verb-second pattern, so if another element comes first, the verb usually stays in second position:

• Nú er framtíðarheimilið tilbúið = Now the future home is ready

But in a simple statement like this one, the structure looks very familiar to an English speaker.

Yes. Compounds with framtíðar- can sometimes be understood in more than one natural English way, depending on context.

For example, it might mean:

• the future home
• the home of the future
• a home someone will live in later
• a futuristic kind of home

The grammar stays the same either way. The exact English wording depends on context, but the structure of the Icelandic word is still:

framtíðar- + heimili + -ið.