Sagan er raunveruleg.

Because -n is the suffixed definite article in Icelandic.

• saga = a story
• sagan = the story

In this sentence, sagan is in the nominative singular, because it is the subject of the sentence.

Also, saga is a feminine noun.

Er is the 3rd person singular present tense of the verb vera (to be).

So:

• ég er = I am
• þú ert = you are
• hann/hún/það er = he/she/it is

Since sagan (the story) is a singular noun, Icelandic uses er:
Sagan er ... = The story is ...

Because the adjective has to agree with the noun it describes in gender, number, and case.

Here, sagan is:

• feminine
• singular
• nominative

So the adjective must also be feminine singular nominative:

• raunverulegur = masculine
• raunveruleg = feminine
• raunverulegt = neuter

That is why the sentence uses raunveruleg.

This is a very common question.

In Sagan er raunveruleg, the adjective is a predicate adjective: it comes after the verb er and describes the subject.

Predicate adjectives in Icelandic are normally not made “definite” the same way attributive adjectives are. They simply agree in gender, number, and case.

Compare:

• Sagan er raunveruleg. = The story is real.
  Here raunveruleg is predicative.

• raunverulega sagan = the real story
  Here the adjective comes directly before the noun, so it is attributive and takes a different form.

So the form in the sentence is exactly what you would expect after er.

The word order is:

Subject + Verb + Adjective/Complement

So:

• Sagan = subject
• er = verb
• raunveruleg = subject complement / predicate adjective

This is very similar to English:

• The story is real.

Icelandic word order can be more flexible than English in some contexts, but this sentence uses the most straightforward pattern.

No. Raunveruleg is just one form of the adjective.

The adjective changes depending on what it describes. For example:

• raunverulegur maður = a real man (masculine)
• raunveruleg saga = a real story (feminine)
• raunverulegt vandamál = a real problem (neuter)

So the adjective itself is not “feminine by nature”; it simply changes form to match the noun.

A rough English-friendly guide would be something like:

SAH-gan er ROIN-veru-leg

A few helpful notes:

• saga has stress on the first syllable: SA-ga
• au in raun- is pronounced somewhat like the vowel in English boy, though not exactly the same
• the final -g in raunveruleg is not pronounced like a strong English g in go; in natural Icelandic speech it is softer

A more careful approximation in IPA is:

[ˈsaːɣan ɛr ˈrœynvɛrʏlɛɣ]

But for a beginner, the most important thing is:

• stress the first syllable of each word
• use a soft final g

It can mean more than just story.

In Icelandic, saga can refer to:

• a story
• a tale
• a narrative
• history, in some contexts

This is the same word seen in Íslendingasögur (the Sagas of Icelanders), where saga refers to a narrative or saga in the literary/historical sense.

So depending on context, sagan could mean the story or the saga.

Yes. That would mean This is a real story.

The difference is:

• Sagan er raunveruleg. = The story is real.
• Þetta er raunveruleg saga. = This is a real story.

In the second sentence:

• saga is indefinite, not definite
• raunveruleg comes before the noun as an attributive adjective

Both are correct, but they are structured differently.

It is in the nominative singular feminine.

That is because predicate adjectives after vera usually match the subject, and the subject here, sagan, is nominative singular feminine.

So even though raunveruleg is not the subject itself, it still takes the same grammatical features here:

• nominative
• singular
• feminine

This is a normal pattern with vera (to be) in Icelandic.