Áburðurinn er hér.

In Icelandic, the definite article is very often a suffix, not a separate word like English the.

So:

• áburður = fertilizer / manure
• áburðurinn = the fertilizer / the manure

The ending -inn is the masculine singular nominative definite article here. This is one of the first big differences English speakers notice in Icelandic.

The dictionary form is áburður.

That is the indefinite singular form, meaning fertilizer or manure, depending on context.

When you add the definite article, it becomes:

• áburður = fertilizer
• áburðurinn = the fertilizer

If you look the word up in a dictionary, you would usually search for áburður, not áburðurinn.

Because the sentence is talking about a specific, known thing: the fertilizer.

Compare:

• Áburður er hér. = Fertilizer is here / There is fertilizer here
• Áburðurinn er hér. = The fertilizer is here

So the version with -inn is more specific and definite.

Er means is and comes from the verb vera, which means to be.

So in this sentence:

• Áburðurinn = the fertilizer
• er = is
• hér = here

This is a very common verb, and er is the 3rd person singular present tense form.

Examples:

• Hann er hér. = He is here.
• Húsið er stórt. = The house is big.

Because this is a simple declarative sentence, and Icelandic often uses a word order that looks very familiar to English:

subject + verb + adverb

So:

• Áburðurinn = subject
• er = verb
• hér = adverb of place

That gives:

Áburðurinn er hér.
= The fertilizer is here.

Even though Icelandic grammar is quite different from English in many ways, simple sentences like this can look very similar.

Hér means here, referring to location.

It tells you where something is:

• Hún er hér. = She is here.
• Bíllinn er hér. = The car is here.

A useful distinction for learners is that Icelandic often separates location and movement toward a place more clearly than English does.

• hér = here (in this place)
• hingað = here, to here (movement toward here)

So Áburðurinn er hér means the fertilizer is located here, not coming here.

It is in the nominative singular.

That is because it is the subject of the sentence. In Icelandic, subjects are often in the nominative case.

So:

• áburður = nominative singular indefinite
• áburðurinn = nominative singular definite

This is one reason the ending looks the way it does: both the noun and the attached article reflect grammatical case and number.

Áburður is masculine.

That matters because in Icelandic, the form of the definite article and many other endings depend on the noun’s gender.

Here, the masculine nominative singular definite form is:

• áburðurinn

If it were a noun of a different gender, the definite form would look different.

A rough English-friendly guide would be:

OW-bur-thur-inn er hyair

A few important pronunciation notes:

• á is usually pronounced like ow in cow
• ð is like the th in this (not thin)
• u in Icelandic does not sound exactly like English oo
• é in hér sounds somewhat like ye in many descriptions

More careful learners should especially watch these letters:

• ð in áburður
• á
• é

Also, Icelandic pronunciation is not always obvious from English spelling habits, so it helps to hear native audio if possible.

Yes. Depending on context, áburður can mean fertilizer or manure.

In many practical contexts:

• agricultural / gardening context: fertilizer
• farming / organic material context: manure

So Áburðurinn er hér could refer to either, depending on the situation. The grammar stays the same either way.

Yes. The accents in Icelandic are part of the spelling and should not be ignored.

Here you have:

• Á in Áburðurinn
• é in hér

These are not optional marks. They usually indicate a different vowel sound, not just stress.

So:

• a and á are different
• e and é are different

For learners, it is best to treat accented vowels as separate letters with their own pronunciations.

Yes, you can.

Hér er áburðurinn also means The fertilizer is here, but it puts more emphasis on here or presents the location first.

Compare:

• Áburðurinn er hér. = neutral, straightforward statement
• Hér er áburðurinn. = Here is the fertilizer / The fertilizer is here

Both are natural, but the focus shifts a little depending on word order.

The plural would be different in both the noun and the verb:

• Áburðirnir eru hér. = The fertilizers are here

Compare:

• Áburðurinn er hér. = the fertilizer is here
• Áburðirnir eru hér. = the fertilizers are here

Changes to notice:

• áburðurinn → áburðirnir
• er → eru

This shows how Icelandic changes words for number as well as definiteness.