Reflexia apare în apă.

In Romanian, the definite article is usually attached to the end of the noun.

• reflexie = reflection / a reflection
• reflexia = the reflection

So reflexia means the reflection, not just reflection in general.

This is very different from English, where the is a separate word.

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

Here is the basic idea:

• eu apar = I appear
• el/ea apare = he/she/it appears

Since reflexia is a singular subject, Romanian uses apare.

Romanian often leaves out subject pronouns when they are not needed.

In English, you usually need to say:

• It appears in the water

But in Romanian, the verb form already tells you the person and number, and the noun reflexia is the subject, so no extra pronoun is necessary.

So Reflexia apare în apă is completely natural, not incomplete.

În means in.

So:

• în apă = in water / in the water, depending on context

It is the normal preposition to use for location inside something.

Both are possible in Romanian, but they mean slightly different things.

• în apă = in water / in the water in a more general sense
• în apa = in the water with a more specific, definite sense

In this sentence, în apă sounds natural because the focus is on the place where the reflection appears, not on identifying a particular body of water very strongly.

Also, Romanian often uses the noun without the definite article after a preposition when speaking more generally.

Yes. Reflexie is a feminine noun.

You can tell partly from the ending and from how the definite form is made:

• o reflexie = a reflection
• reflexia = the reflection

If you added an adjective, it would also need feminine singular agreement, for example:

• reflexia clară = the clear reflection

Yes. Romanian word order is more flexible than English word order.

The neutral order here is:

• Reflexia apare în apă.

But you could also say:

• În apă apare reflexia.

This version gives more emphasis to în apă.

Even though the order changes, the meaning stays very similar because the endings and structure make the roles clear.

A rough pronunciation guide is:

• Reflexia ≈ re-FLEK-see-a
• apare ≈ a-PA-re
• în ≈ a short oon/in sound with Romanian î
• apă ≈ A-puh, with ă being a short neutral vowel, like the a in sofa

A few important sounds:

• x in reflexia sounds like ks
• ă is not a full English a; it is a weak, central sound
• î is a distinct Romanian vowel, not exactly the same as any usual English vowel

Usually yes in this sentence, but it can feel a bit broader.

A apărea can mean:

• to appear
• to show up
• to become visible

So Reflexia apare în apă suggests that the reflection becomes visible or can be seen in the water.

Depending on context, English might translate it as:

• The reflection appears in the water.
• The reflection shows up in the water.

It would be:

• O reflexie apare în apă.

That means:

• A reflection appears in the water.

Compare:

• Reflexia apare în apă. = The reflection appears in the water.
• O reflexie apare în apă. = A reflection appears in the water.

So the original sentence is talking about a specific reflection, not just any reflection.