Fisura apare pe vază.

The dictionary form is fisură.
In the sentence, fisura is the definite singular form, meaning the crack / the fissure.

A very common Romanian pattern is:

• fisură = a crack
• fisura = the crack

Also notice the spelling change:

• base noun: fisură
• definite form: fisura

That is normal for many feminine nouns ending in -ă.

It is the attached definite article. Romanian usually puts the at the end of the noun instead of using a separate word before it.

So:

• fisură = a crack
• fisura = the crack

This is one of the biggest differences from English.

Because when many feminine nouns take the definite article, the form changes a little.

For example:

• vază → vaza
• fisură → fisura

So fisură becomes fisura, not fisurăa.

Apare is the 3rd person singular present form of the verb a apărea = to appear.

It matches the subject fisura, which is singular.

Present tense of a apărea:

• eu apar = I appear
• tu apari = you appear
• el/ea apare = he/she/it appears
• noi apărem = we appear
• voi apăreți = you all appear
• ei/ele apar = they appear

Because the subject is fisura = the crack, Romanian uses apare.

Romanian often leaves out subject pronouns because the verb ending already shows the person and number.

So apare already tells you it is he/she/it appears.
That means Fisura apare is perfectly complete without adding ea.

Adding ea would usually sound unnecessary unless you wanted emphasis.

Pe is the normal preposition for on in many situations.

So:

• pe masă = on the table
• pe perete = on the wall
• pe vază = on the vase

It marks something as being on the surface of something.

This is a very natural question, because the difference matters.

• pe vază = on a vase
• pe vaza = on the vase

So strictly speaking, the noun without the attached article is indefinite.

If you are talking about one specific vase already known from context, Romanian would very often use pe vaza.

Learner examples sometimes simplify things, but in normal Romanian the presence or absence of the article changes the meaning.

The dictionary form is vază, meaning vase.

Its main singular forms are:

• vază = a vase
• vaza = the vase

So this noun behaves much like fisură / fisura in the definite form.

It is in the accusative, because pe normally takes the accusative.

However, for many nouns, the accusative form looks the same as the nominative form, so you do not see a special change here.

That is why you simply see:

• pe vază
• pe vaza

The case is there grammatically, even if the noun’s form does not change much.

No, Romanian word order is fairly flexible.

Fisura apare pe vază is a neutral, straightforward order:

• subject: Fisura
• verb: apare
• prepositional phrase: pe vază

But Romanian could move things around for emphasis, for example:

• Pe vază apare fisura.

That might put more focus on where the crack appears.

Even so, the original order is the most neutral and easiest for learners.

A simple pronunciation guide would be:

• Fisura ≈ fee-SOO-ra
• apare ≈ a-PA-re
• pe ≈ peh
• vază ≈ VA-zuh

A few useful points:

• ă is a short central vowel, similar to uh
• z is like English z
• r in Romanian is usually trilled or tapped

The natural stress is usually:

• fi-SU-ra
• a-PA-re
• VA-ză

Yes, but it can sound a little more formal or technical than some other options.

Fisură often suggests:

• a fine crack
• a fissure
• a structural split

In everyday speech, Romanians also often use crăpătură for crack, depending on context.

So:

• fisură = often a bit more technical or precise
• crăpătură = often more everyday

Both are useful words, but fisură is absolutely normal Romanian.

Yes. A apărea can mean not only to appear in a general sense, but also to become visible or to show up.

So in a sentence like this, it can suggest that the crack is now noticeable on the vase.

That makes apare a very natural verb here.