Faðirinn kemur heim eftir vinnu.

Because -inn is the definite article attached to the noun.

• faðir = father / a father
• faðirinn = the father

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

So in this sentence, faðirinn means the father.

It is in the nominative singular because it is the subject of the sentence — the person doing the action.

The verb is kemur = comes, and the one who comes is faðirinn, so nominative is used.

This noun is a little irregular:

• nominative singular: faðir
• accusative singular: föður
• dative singular: föður
• genitive singular: föður

With the definite article in the nominative singular, it becomes faðirinn.

Kemur is the 3rd person singular present tense of koma = to come.

The subject faðirinn is:

• third person: not I or you, but he/she/it
• singular: one person

So the verb has to match that:

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

That is why kemur is used here.

Not necessarily. The present tense in Icelandic, just like in English, can describe:

• something happening now
• a habitual action
• a general fact

So Faðirinn kemur heim eftir vinnu can mean something like:

• The father comes home after work
• Father comes home after work
• depending on context, it may describe a routine

It does not have to mean that he is coming home at this exact moment.

This is a very common and important distinction.

• heim = homeward, to home → used for movement toward home
• heima = at home → used for location

So:

• kemur heim = comes home
• er heima = is at home

In this sentence there is movement, so heim is correct.

Because the preposition eftir here requires the dative case.

The noun vinna = work Its dative singular form is vinnu

So:

• vinna = nominative
• vinnu = dative

Since eftir in the sense of after takes the dative, we get:

• eftir vinnu = after work

Because Icelandic often leaves out the article when talking about something in a general, routine sense.

So:

• eftir vinnu = after work in a general sense
• eftir vinnuna = after the work / after the job / after the work session, more specific

In this sentence, work is being used in the everyday general sense, so vinnu without the article sounds natural.

Very often, yes, but it depends on meaning.

With the meaning after, as in time or sequence, it normally takes the dative:

• eftir vinnu = after work
• eftir mat = after food / after the meal

But Icelandic prepositions can have different meanings and sometimes different case patterns in different uses, so it is best to learn them together with examples.

For this sentence, the key point is simple:

• eftir meaning after → dative
• therefore vinnu

In context, yes, it might sound natural in English as Father comes home after work, but grammatically the Icelandic says the father because of -inn.

So the form itself is definitely definite:

• faðirinn = the father

Whether English chooses the father, the dad, or just father depends a bit on style and context, but the Icelandic grammar is clearly definite here.

This is the normal straightforward order:

• Faðirinn = subject
• kemur = verb
• heim = direction
• eftir vinnu = time expression

So the sentence follows a basic pattern like: Subject + Verb + Other information

However, Icelandic is a verb-second language, so word order can change when something else is placed first.

For example, a time phrase could come first, and then the verb would still come in second position. But in the sentence you were given, the order is the most neutral and natural one.

A few sounds may stand out to an English speaker:

• ð in faðirinn is like the th in this, not the th in thin
• the first a is broad, roughly like fa-
• -irinn is pronounced as part of the same word, since the article is attached

A rough English-friendly approximation is: FAA-thi-rin but with the th of this

This is only approximate, but it helps you avoid pronouncing ð like d or th as in thin.

Yes, if you want a more everyday, family-style word.

• faðirinn = the father — more formal or neutral/literary
• pabbinn = the dad — more colloquial and common in everyday speech

So:

• Faðirinn kemur heim eftir vinnu is grammatically fine
• Pabbinn kemur heim eftir vinnu would sound more natural in casual conversation for many speakers

The grammar of the sentence stays the same.