Tento výsledek znamená změnu.

Both can mean this result, but tento is the standard full form of this in careful neutral Czech.

Here:

• tento = this
• výsledek = result

Tento has to agree with výsledek in:

• gender: masculine inanimate
• number: singular
• case: nominative

So tento výsledek is the correct matching form.

You will also hear ten výsledek, but ten is more often that/the depending on context, and Czech uses it more flexibly than English.

Because it is the masculine inanimate nominative singular form of the demonstrative this.

Czech demonstratives change form depending on the noun they describe.

For tento:

• masculine animate: tento
• masculine inanimate: tento
• feminine: tato
• neuter: toto

Since výsledek is a masculine inanimate noun and is the subject of the sentence, tento is the correct form.

Because it is the subject of the sentence, so it is in the nominative case.

The basic dictionary form of the noun is:

• výsledek = result

In Tento výsledek znamená změnu, this result is the thing doing the meaning/signifying, so it stays in the nominative:

• tento výsledek = this result

Znamená is the 3rd person singular present tense form of the verb znamenat.

Conjugation:

• já znamenám = I mean / signify
• ty znamenáš = you mean
• on/ona/ono znamená = he/she/it means

Since the subject is tento výsledek (this result), which is singular and treated like it, Czech uses:

• znamená = means

Because změnu is in the accusative case, which is used here for the direct object.

The noun is:

• nominative: změna = change
• accusative: změnu

In this sentence, change is what the result means/signifies, so it is the object of the verb:

• znamená změnu = means a change

That is why Czech uses změnu, not změna.

Because Czech has no articles like English a/an/the.

So:

• změna can mean a change or the change
• the exact meaning depends on context

In this sentence, English naturally translates it as a change, but Czech does not need a separate word for that.

No, Czech word order is fairly flexible because case endings show the grammatical roles.

The neutral order here is:

• Tento výsledek znamená změnu.

That is a natural subject–verb–object order.

Other orders are possible, but they change emphasis:

• Změnu znamená tento výsledek. = emphasizes this result
• Tento výsledek změnu znamená. = possible, but marked/emphatic

So the given sentence is the most straightforward, neutral version.

Yes. Znamenat is a broad verb.

Depending on context, it can mean:

• mean
• signify
• indicate
• sometimes even involve

In this sentence, means is the most natural translation, but signifies a change could also fit depending on style.

A rough English-style guide is:

• TENTO ≈ TEN-to
• VÝSLEDEK ≈ VEE-sle-dek
• ZNAMENÁ ≈ ZNA-me-naa
• ZMĚNU ≈ ZMNYE-nu

A few useful pronunciation notes:

• Czech stress is usually on the first syllable of each word.
• ý is a long ee sound.
• ě often makes the previous consonant softer; in změnu, it sounds roughly like mye.
• á is a long a.

Yes. In Czech, grammatical gender is not the same as biological sex.

Výsledek is:

• masculine
• specifically masculine inanimate

That is why it uses:

• tento výsledek

Its gender is just a grammatical property of the noun.

No. Tahle is the wrong gender/form for výsledek.

Tahle is a colloquial form used with feminine nouns:

• tahle změna = this change

But výsledek is masculine inanimate, so you need:

• tenhle výsledek in colloquial speech
• tento výsledek in standard neutral style

So:

• Tento výsledek znamená změnu. ✅
• Tenhle výsledek znamená změnu. ✅ colloquial
• Tahle výsledek znamená změnu. ❌

In this sentence:

• tento výsledek = nominative
• změnu = accusative

Why?

• The subject goes in the nominative.
• The direct object goes in the accusative.

So the structure is:

• Tento výsledek = subject
• znamená = verb
• změnu = object

This is a very common Czech pattern.