Ten fotel jest idealny do czytania.

Because fotel is a masculine singular noun in Polish. Demonstratives must agree with the noun’s gender:

• ten = masculine
• ta = feminine
• to = neuter

So:

• ten fotel = this armchair
• ta kanapa = this sofa
• to krzesło = this chair

A useful tip: many Polish nouns ending in a consonant, like fotel, are masculine.

Not exactly. Fotel usually means an armchair or an easy chair, something more comfortable than a basic chair.

Compare:

• fotel = armchair
• krzesło = chair
• kanapa / sofa = sofa/couch

So this sentence sounds like it is talking about a comfortable seat that is good for reading.

Idealny is an adjective, and in Polish adjectives must agree with the noun they describe in gender, number, and case.

Since fotel is:

• masculine
• singular
• nominative

the adjective also takes the masculine singular nominative form:

• idealny

Compare:

• ten fotel jest idealny = this armchair is ideal
• ta lampa jest idealna = this lamp is ideal
• to miejsce jest idealne = this place is ideal

Do + genitive is a very common Polish pattern meaning for in the sense of suitable for, meant for, or used for.

So:

• idealny do czytania = ideal for reading

This is a very natural structure in Polish. Similar examples:

• okulary do czytania = reading glasses
• lampka do czytania = reading lamp
• czas do odpoczynku = time for rest

In this sentence, do czytania describes the purpose or use of the armchair.

Czytania is the genitive singular form of the verbal noun czytanie.

• czytać = to read
• czytanie = reading
• do czytania = for reading

Why genitive? Because the preposition do requires the genitive case.

So:

• nominative: czytanie
• genitive: czytania

This pattern is very common with verbal nouns in Polish.

Polish usually does not express this idea with an infinitive after do. Instead, it commonly uses a verbal noun:

• do czytania = for reading

This is more natural than trying to build it with an infinitive. English often uses for reading, and Polish works similarly here.

Yes, in a normal full sentence, jest is needed.

• Ten fotel jest idealny do czytania. = correct, standard

Polish does not usually drop to be in the present tense the way Russian does. If you remove jest, the sentence sounds incomplete in ordinary usage.

You might sometimes see omission in headlines, notes, or very informal contexts, but as a standard sentence, keep jest.

Yes, Polish word order is fairly flexible, but the most neutral order here is:

• Ten fotel jest idealny do czytania.

You could change the order for emphasis, but some versions sound more marked or less natural. For example:

• Idealny do czytania jest ten fotel.
  This emphasizes that this armchair is the one that is ideal for reading.

For learners, it is best to remember the neutral pattern:

demonstrative + noun + jest + adjective + do + noun

No. Polish does not use articles.

So fotel can mean:

• a chair / an armchair
• the chair / the armchair

The exact meaning depends on context.

In this sentence, ten helps specify it clearly as this armchair.

A simple pronunciation guide is:

Ten fotel jest idealny do czytania
ten FO-tel yest i-de-AL-ny do chi-TA-nya

A few notes:

• j in Polish sounds like English y in yes
• cz sounds roughly like ch in chocolate, but a bit harder
• ni before a vowel often sounds like ny
• stress is usually on the second-to-last syllable

So the main stresses are roughly:

• FOtel
• ideALny
• czyTAnia

Sometimes yes, depending on context. Idealny often means:

• ideal
• perfect
• exactly right

In this sentence, idealny do czytania means the armchair is really well suited to reading. In natural English, both ideal for reading and perfect for reading could work, but the direct Polish word here is idealny.

Yes, and it means something slightly different.

• idealny do czytania = ideal for reading
• wygodny do czytania = comfortable for reading

So idealny talks about overall suitability, while wygodny focuses more on comfort. In real life, both could make sense for an armchair.