Learn Hardcore Icelandic: Ég sæki pakka eftir vinnu.

Because sæki is the 1st person singular present tense form of the verb að sækja (to fetch / pick up / collect / seek, depending on context).

With ég (I), Icelandic uses:

ég sæki = I fetch / I pick up
að sækja = to fetch / to pick up

So:

Ég sæki pakka = I pick up a package / package(s)
not Ég sækja pakka

This is similar to the difference between English I go and to go.

What is the dictionary form of sæki?

The dictionary form is að sækja.

If you look the verb up in a dictionary, you will usually find it under sækja, not sæki.

A few useful present-tense forms are:

ég sæki = I pick up
þú sækir = you pick up
hann / hún / það sækir = he / she / it picks up

So sæki is just the ég-form of sækja.

What exactly does sækja mean here?

In this sentence, sækja means something like:

pick up
collect
go and get

So Ég sæki pakka eftir vinnu means that the speaker will go somewhere and collect a package after work.

This verb is very common in Icelandic and can be used in several related ways. For example, it can also mean:

to fetch someone
to attend something
to apply for something
to seek something

But in this sentence, with pakka, the natural meaning is pick up / collect a package.

Why is it pakka and not pakki?

Because pakka is the accusative form, and here the package is the direct object of the verb.

The noun is:

pakki = a package/parcél (nominative singular)
pakka = a package/parcél (accusative singular)

Since the speaker is picking up the package, the noun is the thing being acted on, so Icelandic uses the accusative:

Ég sæki pakka

This is very normal in Icelandic: the form of the noun changes depending on its role in the sentence.

Does pakka mean a package or the package?

By itself, pakka here is usually understood as a package or just package(s) in a general sense.

If you specifically wanted the package, Icelandic would usually use the definite ending:

pakkann = the package (accusative singular)

So:

Ég sæki pakka = I’m picking up a package / package(s)
Ég sæki pakkann = I’m picking up the package

Icelandic often puts the onto the end of the noun instead of using a separate word like English does.

Could pakka here also mean packages?

Yes, it can be ambiguous in form.

For pakki, the form pakka can be:

accusative singular = a package
accusative plural = packages

So without more context, Ég sæki pakka can sometimes mean either:

I pick up a package
I pick up packages

Usually the context tells you which meaning is intended.

If you wanted to make the plural clearer, you could add something else, for example:

Ég sæki tvo pakka = I pick up two packages

Why is there no word for a in the sentence?

Because Icelandic often leaves the indefinite article untranslated.

English says:

a package

But Icelandic very often just says:

pakka

There is no separate word for a/an in normal Icelandic the way there is in English.

So:

Ég sæki pakka literally looks like I pick up package
but it naturally means I pick up a package or I pick up package(s)

Why is it eftir vinnu and not eftir vinna?

Because the preposition eftir here takes the dative case.

The noun is:

vinna = work (nominative)
vinnu = work (dative/accusative form, depending on context)

After eftir in the meaning after, Icelandic uses the dative, so you get:

eftir vinnu = after work

This is a very common thing in Icelandic: prepositions often control a specific case, and learners have to memorize which case goes with which preposition.

What does eftir mean here? Does it always mean after?

Here, eftir means after:

eftir vinnu = after work

But eftir is a very common preposition/adverb and can have several meanings depending on context, such as:

after
along
for
according to
remaining / left

So you should learn eftir by context, not as a one-word translation that always works everywhere.

In this sentence, though, the meaning is straightforward: after work.

Does eftir vinnu mean after my work or just after work in general?

Usually it means after work in a general, natural sense — basically after I finish work / after my workday.

Icelandic often does not need to say my if the meaning is already obvious from context.

So eftir vinnu works much like English after work.

If you wanted to be more explicit, you could sometimes say something more specific, but in an ordinary sentence this phrasing is completely natural.

Is the sentence talking about the present, or about a future plan?

Grammatically, sæki is present tense, but Icelandic, like English, often uses the present tense for a planned future action.

So depending on context, Ég sæki pakka eftir vinnu could mean something like:

I pick up a package after work (habitual / general)
I’m picking up a package after work (today’s plan)
I’ll pick up a package after work (future sense from context)

The exact time reference comes from the situation, not just from the verb form alone.

Can the sentence describe a habit, not just a one-time action?

Yes.

Ég sæki pakka eftir vinnu can describe:

a habit: I pick up packages after work
a current plan: I’m picking up a package after work
a near-future intention: I’ll pick up a package after work

Icelandic present tense is often quite flexible, just like English present forms can be.

Could the word order be changed?

Yes, Icelandic word order is somewhat flexible, especially if you want to emphasize a particular part of the sentence.

The neutral order here is:

Ég sæki pakka eftir vinnu.

But you might also see something like:

Eftir vinnu sæki ég pakka.

That version puts after work first for emphasis or flow. In that case, notice that the verb still comes in the second position:

Eftir vinnu
- sæki
  - ég

This is a very important pattern in Icelandic main clauses.

Why doesn’t Icelandic need a separate word for afterward here?

Because eftir vinnu already expresses the time relationship clearly.

English might say:

after work
afterward, after work
once work is over

Icelandic simply uses the prepositional phrase:

eftir vinnu

That is enough to mean after work / once work is finished.

How is Ég sæki pakka eftir vinnu pronounced?

A rough English-friendly guide would be:

Ég ≈ yeg or yehg
sæki ≈ SIGH-kih or SAI-kih
pakka ≈ PAH-kah
eftir ≈ EF-tir
vinnu ≈ VIN-nuh

A few pronunciation notes:

æ is pronounced a bit like the vowel in eye
kk is pronounced as a long, strong k sound
g in ég is not pronounced like a hard English g in go

A more natural approximate pronunciation of the full sentence is:

Yeg SAI-kih PAH-kah EF-tir VIN-nuh

What case is vinnu in?

Here, vinnu is in the dative.

That is because eftir in the sense of after takes the dative.

So the structure is:

eftir
- dative

Examples:

eftir vinnu = after work
eftir skóla = after school

This is one of the many places where Icelandic case endings show grammatical relationships that English usually expresses without changing the noun.

Is vinna a noun here or a verb?

Here it is a noun.

vinna as a noun = work
að vinna as a verb = to work

In the sentence eftir vinnu, it is clearly the noun work, because it follows the preposition eftir and appears in the correct case form.

So this part means:

eftir vinnu = after work

not

after to work