Leikarinn er frægur.

Because Icelandic usually adds the definite article to the end of the noun instead of using a separate word like the.

• leikari = actor
• leikarinn = the actor

Here, -inn is the masculine singular definite ending in the nominative case.

This is one of the first big differences from English: Icelandic often builds the directly onto the noun.

Because adjectives in Icelandic change form to match the noun they describe.

In this sentence, leikarinn is:

• masculine
• singular
• nominative

So the adjective also has to be masculine singular nominative:

• frægur = famous, in the form that matches a masculine singular nominative noun

If the noun were feminine or neuter, or in a different case, the adjective form would change.

Er is the 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

In this sentence, er means is.

It is in the nominative case, because it is the subject of the sentence.

In a basic sentence like this, the subject is usually in the nominative:

• Leikarinn = subject
• er = verb
• frægur = adjective describing the subject

So this is a straightforward nominative subject sentence.

Yes. This is the normal basic order for a simple statement:

• Subject + verb + complement

So:

• Leikarinn = subject
• er = verb
• frægur = subject complement

That said, Icelandic also has a strong verb-second pattern, so if another element comes first, the verb often still stays in second position. But in a plain sentence like this, the word order is very natural and basic.

You would use the indefinite noun form:

• leikari er frægur

That means an actor / actor is famous, depending on context.

Icelandic does not usually have a separate word for a/an. The indefinite idea is often just shown by using the bare noun:

• leikari = actor / an actor
• leikarinn = the actor

A rough English-friendly approximation is:

• leikarinn ≈ LAY-ka-rinn
• frægur ≈ something like FRYE-gur or FRYE-yur, depending on how exact you want to be

A few useful notes:

• ei in lei- sounds roughly like the vowel in say, though not exactly the same
• æ in fræ- is roughly like eye
• the r is an Icelandic r, usually a tapped or rolled sound
• the final -ur is a very common Icelandic ending

If you are learning pronunciation seriously, it is best to hear native audio, because Icelandic vowels and consonants do not match English perfectly.

Yes, but then the form may change depending on whether the noun is definite or indefinite.

For example:

• frægur leikari = a famous actor
• frægi leikarinn = the famous actor

Notice that when the adjective comes before a definite noun, it often takes a different form:

• predicate use: Leikarinn er frægur
• attributive use before definite noun: frægi leikarinn

So adjective endings depend not only on gender, number, and case, but also on how the adjective is being used.

Yes. Leikari is a masculine noun.

That matters because Icelandic nouns have grammatical gender, and adjectives must agree with that gender. That is why the sentence uses frægur, the masculine form.

A learner should get used to learning Icelandic nouns together with their gender, because gender affects:

• adjectives
• pronouns
• some article endings
• other parts of grammar

Because Icelandic handles these ideas through inflection rather than extra helper words.

In English, you often rely on separate words and fixed word order. In Icelandic, endings carry a lot of information.

In this sentence:

• leikarinn already includes the
• frægur shows agreement with the noun
• er marks the verb

So Icelandic packs grammar into word endings much more than English does. This sentence is a good example of that.