Dagskráin fyrir fundinn er stutt, en verkefnalistinn minn er langur.

Because Icelandic usually adds the definite article to the end of the noun.

• dagskrá = agenda / schedule
• dagskráin = the agenda

So the ending -in here means the. This is very common in Icelandic:

• fundur = meeting
• fundinn = the meeting
• listi = list
• listinn = the list

The exact form of the article changes depending on gender, case, and number.

There are two things happening here:

1. The noun is definite: fundinn = the meeting
2. The preposition fyrir takes the accusative here, so fundur changes form

The basic noun is:

• fundur = a meeting

But after fyrir in this sentence, it appears in the accusative singular:

• fyrir fund = for a meeting
• fyrir fundinn = for the meeting

So fundinn is the accusative definite form of fundur.

Here fyrir takes the accusative.

That is why you get fundinn rather than nominative fundurinn.

A useful thing to remember is that Icelandic prepositions often control a specific case, and some prepositions can take more than one case with different meanings. In this sentence, fyrir fundinn means for the meeting, and the noun is in the accusative.

Because adjectives in Icelandic agree with the noun they describe, even when they come after er.

Here the adjectives are predicate adjectives:

• Dagskráin ... er stutt
• verkefnalistinn minn er langur

They must match the subject in gender, number, and usually case.

First clause

• dagskráin is feminine singular nominative
• so stuttur becomes stutt

Second clause

• verkefnalistinn is masculine singular nominative
• so langur stays langur

So the different adjective forms are not random; they are showing agreement.

The dictionary forms are:

• stuttur = short
• langur = long

In the sentence, stuttur appears as stutt because it is agreeing with the feminine noun dagskráin.

A very simplified comparison:

• masculine: langur
• feminine: often löng
• neuter: langt

and

• masculine: stuttur
• feminine: stutt
• neuter: stutt

So when you look up adjectives in a dictionary, you usually find the masculine nominative singular form.

Because Icelandic very often expresses possession with:

definite noun + possessive pronoun

So:

• verkefnalistinn minn = my task list
• literally something like the task list of mine

This pattern is extremely common:

• bíllinn minn = my car
• húsið mitt = my house
• vinur minn = my friend

You can sometimes put the possessive before the noun, as in minn verkefnalisti, but that is usually more emphatic, contrastive, or stylistically marked. The most neutral everyday wording here is verkefnalistinn minn.

That is the normal Icelandic pattern for an ordinary possessive phrase.

English says:

• my task list

But Icelandic very often says:

• task-list-the my → verkefnalistinn minn

So for English speakers, this is one of the most important word-order differences to get used to. The noun often comes first, with the definite article attached, and the possessive comes after it.

Because Icelandic usually uses a suffixed definite article instead of a separate article like English the.

So instead of saying:

• the agenda
• the meeting
• the task list

Icelandic says:

• dagskráin
• fundinn
• verkefnalistinn

The the idea is built into the noun itself.

There is also a separate demonstrative/article-like word hinn, but that is not the normal everyday way to form the definite article in simple sentences like this.

Yes, both are compounds, and compound nouns are extremely common in Icelandic.

dagskrá

This is historically made from parts meaning something like day + register/list, but as a modern word it simply means agenda / program / schedule.

verkefnalisti

This is clearly a compound:

• verkefni = task, assignment
• listi = list

So verkefnalisti means task list.

A useful rule with Icelandic compounds is that the last element usually determines the gender of the whole word:

• dagskrá ends in -skrá, which is feminine → the whole noun is feminine
• verkefnalisti ends in -listi, which is masculine → the whole noun is masculine

That helps explain why stutt agrees one way and langur another way.

Because this sentence has a very straightforward main-clause structure:

• Dagskráin fyrir fundinn = subject phrase
• er = verb
• stutt = complement
• en = but
• verkefnalistinn minn = subject phrase
• er = verb
• langur = complement

So the overall pattern is basically:

subject + verb + adjective, but subject + verb + adjective

That part is quite English-like. What feels less English-like is mainly:

• the suffixed definite article
• case after the preposition fyrir
• adjective agreement
• the possessive coming after the noun

No. That would be incorrect.

The adjective must agree with dagskráin, which is feminine singular nominative. The correct form is stutt.

So:

• dagskráin er stutt = correct
• dagskráin er stuttur = incorrect

By contrast:

• verkefnalistinn er langur = correct, because verkefnalistinn is masculine

This is one of the most important grammar habits in Icelandic: always check the noun’s gender before choosing the adjective form.

Yes, in a sentence like this, en works very much like English but.

It connects two contrasting clauses:

• the agenda is short
• but my task list is long

So en is a very common coordinating conjunction used to join ideas in contrast.

A very helpful chunking would be:

• Dagskráin = the agenda
• fyrir fundinn = for the meeting
• er stutt = is short
• en = but
• verkefnalistinn minn = my task list
• er langur = is long

This kind of chunking makes it easier to see both the grammar and the rhythm of the sentence. It also helps you notice repeated patterns, especially noun phrase + er + adjective.