Tjónamatsmaðurinn kemur í dag.

It is a long Icelandic compound noun:

• tjón = damage, loss
• mat = assessment, evaluation
• maður = man, person, agent
• -inn = the

So tjónamatsmaðurinn means something like the damage assessor or the claims adjuster.

A very literal breakdown would be the damage-assessment person/man, but in natural English you would usually translate it by the job title, not word-for-word.

That s is a linking element that comes from the genitive form of the first part of the compound.

Here, tjónamat means damage assessment, and when it is used before another noun, it becomes tjónamats-.

So:

• tjónamat = damage assessment
• tjónamatsmaður = damage-assessment person, assessor

This kind of -s- is very common in Icelandic compounds. You do not always need to translate it; it is just part of how the compound is built.

In Icelandic, the definite article is usually added to the end of the noun as a suffix.

For example:

• maður = man, person
• maðurinn = the man, the person

The same thing happens with compounds:

• tjónamatsmaður = damage assessor
• tjónamatsmaðurinn = the damage assessor

So instead of a separate word like English the, Icelandic often puts the article directly onto the noun.

Because kemur is the present tense, 3rd person singular form of koma, which means to come.

Here the subject is singular:

• tjónamatsmaðurinn = the damage assessor

So the verb must also be singular:

• ég kem = I come
• þú kemur = you come
• hann/hún/það kemur = he/she/it comes

So Tjónamatsmaðurinn kemur means The damage assessor comes / is coming.

Also, koma is the infinitive, so you cannot use koma by itself here.

It can function like a future in this sentence.

Icelandic often uses the present tense for something that is going to happen soon or is scheduled, especially when there is a time expression such as í dag.

So kemur í dag can naturally mean:

• comes today
• is coming today

In English, is coming today is often the most natural translation, even though Icelandic uses a simple present form.

Í dag means today.

Word-for-word, it is:

• í = in
• dag = day

But as a full expression, í dag simply means today. It is a fixed, very common time phrase.

So you should learn í dag as a unit, rather than trying to translate each part too mechanically.

Because dagur is the nominative form, but after the preposition í, the word appears in a different case.

The basic noun is:

• dagur = day

But in the expression í dag, it changes form.

This is one of the normal case changes that happen in Icelandic after prepositions. So learners should get used to seeing nouns change form depending on their role in the sentence.

It is in the nominative singular.

That is because it is the subject of the sentence:

• Tjónamatsmaðurinn = the subject
• kemur = the verb

In Icelandic, subjects of ordinary finite clauses are typically in the nominative case.

So here:

• nominative singular masculine: tjónamatsmaðurinn

Yes, but the meaning or emphasis may shift slightly.

The sentence you have is the neutral order:

• Tjónamatsmaðurinn kemur í dag.

If you want to emphasize today, you can put the time expression first:

• Í dag kemur tjónamatsmaðurinn.

That is very natural Icelandic too.

A useful rule is that main clauses in Icelandic usually follow a verb-second pattern. That means if you move í dag to the front, the verb kemur still stays in second position.

So:

• Tjónamatsmaðurinn kemur í dag.
• Í dag kemur tjónamatsmaðurinn.

Both are correct.

Not necessarily in translation.

In compounds, -maður often appears in job titles and role words, and English usually translates those by the profession or function, not literally with man.

So tjónamatsmaður is best understood as a job title such as:

• damage assessor
• claims adjuster

Grammatically, the noun is masculine, but in translation you usually focus on the role, not on the literal word man.