Der Tapeziertisch ist breit.

Der is the masculine singular definite article in the nominative case.

In this sentence, Tapeziertisch is the subject, so it takes the nominative article:

• der Tapeziertisch = the wallpapering table / pasting table

German nouns have grammatical gender, so you have to learn the noun together with its article:

• der = masculine
• die = feminine
• das = neuter

So it is der Tapeziertisch, not die or das.

It is in the nominative case because it is the subject of the sentence — the thing being described.

A good way to spot this is to ask:

• What is broad?
• The tapeziertisch is broad.

That makes der Tapeziertisch the subject, so nominative is used.

In a normal German main clause, the finite verb usually comes in second position.

So the pattern here is:

• Der Tapeziertisch = subject
• ist = verb
• breit = complement/adjective

This is a basic German word order pattern:

• Der Tisch ist groß.
• Das Haus ist alt.
• Die Straße ist lang.

So Der Tapeziertisch ist breit. follows the standard subject + verb + adjective structure.

Because breit is being used predicatively — that means it comes after the verb sein and describes the subject.

In German, adjectives used this way do not take adjective endings.

Compare:

• Der Tapeziertisch ist breit.
  Here breit is after ist, so it has no ending.

But before a noun, adjectives do take endings:

• der breite Tapeziertisch
• ein breiter Tapeziertisch

So:

• after sein: breit
• before a noun: breite / breiter / breites, etc., depending on grammar

It is an adjective.

It describes the noun Tapeziertisch, even though it comes after the verb ist. In German, adjectives often appear after sein in this kind of sentence:

• Der Tisch ist breit.
• Die Wand ist weiß.
• Das Kind ist müde.

English sometimes makes learners think of this as adverb-like because it comes after the verb, but in German it is still an adjective.

Yes. Tapeziertisch is a compound noun, which is very common in German.

It is made from:

• tapezieren = to wallpaper / to paste wallpaper
• Tisch = table

So Tapeziertisch is literally a wallpapering table or pasting table.

A useful rule for German compounds:

• the last part usually determines the gender and the basic meaning category

Since Tisch is masculine (der Tisch), the compound is also masculine:

• der Tapeziertisch

Because all nouns are capitalized in German.

So in this sentence:

• Der is capitalized because it begins the sentence
• Tapeziertisch is capitalized because it is a noun
• ist and breit are not capitalized

This is a very important spelling rule in German.

Breit is pronounced roughly like brite in English.

A few helpful points:

• br sounds similar to English br
• ei in German usually sounds like English eye
• final t is clearly pronounced

So:

• breit ≈ brite

The ei spelling is especially important in German:

• ei sounds like eye
• ie usually sounds like ee

A rough pronunciation guide is:

ta-peh-TSIR-tish

A few key points:

• Ta- is like tah
• pe is like peh
• zier here sounds roughly like tseer
• Tisch sounds a bit like tish, but with the German sch sound like English sh

Also remember that German compound nouns are spoken as one word, not as separate words.

Yes. That is the same grammar pattern, just with a more common noun:

• Der Tisch ist breit. = The table is wide.

This is a good model sentence for learning the structure:

• Der Tisch ist breit.
• Der Schrank ist hoch.
• Das Bett ist weich.

So the sentence is useful not only for this specific noun, but also as a pattern:

• [subject] + ist + [adjective]

Yes, breit can mean both wide and broad, depending on context.

For physical objects like a table, wide is often the most natural English translation, but broad is possible in some contexts too.

German breit is used in many situations involving width or broadness:

• ein breiter Tisch = a wide table
• eine breite Straße = a wide street
• breite Schultern = broad shoulders

So the exact English wording depends on context, but the German adjective is perfectly normal here.