Die slaapkamer is skoon.

In this sentence, die is the definite article, so it means the.

Afrikaans is much simpler than Dutch or German in this area:

• die = the for singular nouns
• die = the for plural nouns too

So Afrikaans does not use different forms of the depending on gender the way German does. You do not need to learn masculine, feminine, or neuter articles for nouns in everyday Afrikaans.

Yes. slaapkamer is a compound noun:

• slaap = sleep
• kamer = room

So slaapkamer literally means sleep-room, which is the normal Afrikaans word for bedroom.

Compound nouns are very common in Afrikaans, just as in Dutch and German, and often more common than in English.

This is the normal word order for a simple statement in Afrikaans:

• Die slaapkamer = subject
• is = verb
• skoon = adjective/complement

So the pattern is:

Subject + verb + complement

This is very similar to English:

• The bedroom is clean.

Afrikaans main clauses usually keep the verb in the second position, and in a simple sentence like this that gives you the familiar subject-verb order.

Yes. is is the present-tense form of the verb to be in Afrikaans.

One very useful thing for learners is that Afrikaans does not change this verb the way English does:

• Ek is = I am
• Jy is = you are
• Hy is = he is
• Ons is = we are
• Hulle is = they are

So unlike English, Afrikaans does not use am / is / are. It just uses is.

Here skoon comes after the verb is, so it is a predicate adjective. Predicate adjectives normally stay in their basic form in Afrikaans.

That is why you get:

• Die slaapkamer is skoon.
• Die kamers is skoon.

The adjective does not change just because the noun changes.

Compare that with adjectives placed before a noun, where Afrikaans often does add -e:

• ’n skoon slaapkamer = a clean bedroom
• die skoon slaapkamer = the clean bedroom

So after is, skoon stays simple.

Its most common meaning is clean, but skoon can have a few related uses depending on context.

Common ideas include:

• clean
• neat
• free from dirt
• sometimes clear or pure in certain expressions

So in Die slaapkamer is skoon, the natural meaning is simply that the bedroom is clean/tidy.

A simple learner-friendly pronunciation guide would be:

• die ≈ dee
• slaapkamer ≈ slahp-kah-mer
• is ≈ iss
• skoon ≈ something like skhohn or skoan, with a long vowel

A few pronunciation notes:

• aa in slaap is a long vowel
• oo in skoon is also long
• sk in skoon is pronounced clearly; it is not silent

If you already know Dutch, some of these sounds will feel familiar.

Yes. baie means very or a lot, so:

• Die slaapkamer is skoon. = The bedroom is clean.
• Die slaapkamer is baie skoon. = The bedroom is very clean.

This is a very natural way to intensify an adjective in Afrikaans.

Yes. Afrikaans has an indefinite article: ’n, which means a/an.

Examples:

• ’n slaapkamer = a bedroom
• ’n skoon slaapkamer = a clean bedroom

A few important notes:

• ’n is written with an apostrophe and a lowercase n
• It is never capitalized, even at the beginning of a sentence in normal spelling; instead, the next word is capitalized if needed

So:

• ’n Slaapkamer is skoon. = A bedroom is clean.
  (Grammatically possible, though less natural without context.)

Yes. The plural of slaapkamer is slaapkamers.

So:

• Die slaapkamer is skoon. = The bedroom is clean.
• Die slaapkamers is skoon. = The bedrooms are clean.

Notice two useful things:

1. The noun takes -s in the plural here.
2. The verb is still is, because Afrikaans does not change it like English is/are.

Yes, you could.

• Die kamer is skoon. = The room is clean.
• Die slaapkamer is skoon. = The bedroom is clean.

The difference is just that slaapkamer is more specific:

• kamer = room
• slaapkamer = bedroom

So if you specifically mean the bedroom, slaapkamer is the better choice.