A rough English-friendly pronunciation is HAA-dan-ka ye na STYE-nyeh.
A few notes:
If you want a more exact pronunciation, it is approximately [haːdanka jɛ na scɛɲɛ].
Hádanka is in the nominative singular, which is the basic dictionary form. It is in that form because it is the subject of the sentence.
So in grammatical terms:
Also, hádanka is a feminine noun, which you can often guess from the ending -a.
Because after na when it means a fixed location, Czech uses the locative case.
The dictionary form is:
But after na for location:
So stěně is the locative singular form of stěna.
Because Czech makes a difference between location and movement.
So:
This is a very common Czech pattern:
Here, stěně is locative singular.
You may notice that the same form can sometimes also be dative in other contexts, but in this sentence it is definitely locative, because it follows the preposition na in a location meaning.
So the structure is:
Czech does not have articles like English a/an and the.
So Hádanka je na stěně can mean:
Which one is meant depends on the context.
This is normal in Czech. You usually understand definiteness from the situation, previous sentences, or word order.
Yes. Czech word order is fairly flexible because the case endings show what each word is doing.
For example:
Both are grammatical, but the emphasis changes a little.
So the basic meaning stays the same, but the information focus can shift.
They are important parts of Czech spelling.
In stěně:
So ě is not just decoration; it changes pronunciation.
Yes, stěna is a normal word for wall, especially for a wall as a surface or side of a room.
You can also hear zeď, which often refers more concretely to a wall as a solid structure.
In many everyday situations, both can translate as wall, but they are not always interchangeable in every context.
For this sentence, na stěně sounds perfectly natural for on the wall.