Garðáhöldin eru hér.

It is a compound noun:

• garð- = garden or yard
• áhöld = tools, implements, or equipment
• -in = the attached definite article, meaning the

So garðáhöldin means the gardening tools or the garden tools.

In Icelandic, compounds are very common, and the last part of the compound is the part that gets inflected for things like definiteness.

The dictionary form is garður. But in compounds, Icelandic usually uses a stem form rather than the full nominative singular form.

So:

• garður → garð- in compounds

That is why you get garðáhöld, not garðuráhöld.

This is very normal in Icelandic word formation.

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

Here:

• áhöld = tools
• áhöldin = the tools

And since this is a compound, the article appears at the end of the whole word:

• garðáhöld = gardening tools
• garðáhöldin = the gardening tools

So Icelandic often expresses the as a suffix rather than as a separate word.

Because garðáhöldin is plural.

The verb vera means to be. In the present tense:

• er = is for singular
• eru = are for plural

So:

• Garðáhaldið er hér = The gardening tool is here
• Garðáhöldin eru hér = The gardening tools are here

The verb has to agree with the subject in number.

It is plural.

The basic noun is:

• áhald = tool / implement
• áhöld = tools / implements

Then the definite ending gives:

• áhöldin = the tools

So garðáhöldin is a plural noun meaning the gardening tools.

It is functioning as the subject of the sentence, so it is nominative.

However, there is one small wrinkle: for many neuter plural nouns in Icelandic, the nominative and accusative forms look the same. So the form garðáhöldin itself does not visibly change here, but in this sentence it is nominative because it is the subject of eru.

Hér is an adverb of place. It means here.

So the structure is basically:

• Garðáhöldin = the subject
• eru = the verb
• hér = where they are

This is very similar to English The gardening tools are here.

Yes. Garðáhöldin eru hér is a normal, neutral way to say it.

But Icelandic can also say:

• Hér eru garðáhöldin.

That still means the same basic thing, but it gives more prominence to here.

This happens because Icelandic is a verb-second language, so when another element comes first, the finite verb typically stays in second position.

Because Icelandic normally writes compound nouns as one word.

So English might write something like:

• garden tools

But Icelandic usually combines the parts:

• garðáhöld

This is one of the most noticeable differences between English and Icelandic spelling.

A rough learner-friendly guide would be:

• Garð-: the ð is like th in this
• á: like ow in cow
• eru: roughly EH-ru
• hér: roughly hyer

So a very approximate English-style pronunciation might be:

GARTH-ow-hol-tin EH-ru hyer

That is only approximate, but it can help you get started. The most important sounds to notice are:

• ð
• the long vowel á
• the é in hér