Vedem peretele urât.

Because Romanian often drops subject pronouns when the verb already makes the subject clear.

• vedem = we see
• It is the 1st person plural form of a vedea = to see

So Vedem peretele urât is perfectly complete on its own. You could add noi (we) as Noi vedem peretele urât, but that usually adds emphasis, like we see it.

Vedem is:

• the present tense
• 1st person plural
• from the verb a vedea = to see

A quick pattern:

• văd = I see
• vezi = you see
• vede = he/she sees
• vedem = we see
• vedeți = you all see
• văd = they see

So in this sentence, vedem tells you both the action and the subject.

Because Romanian usually puts the definite article at the end of the noun, not as a separate word before it.

• perete = wall
• peretele = the wall

So the ending -le is the definite article here.

This is a very common Romanian pattern:

• băiat = boy → băiatul = the boy
• carte = book → cartea = the book
• perete = wall → peretele = the wall

You know mainly from the verb form and the meaning.

• vedem already means we see
• so we are the subject
• peretele is the thing being seen, so it is the direct object

In Romanian, many nouns have the same form for nominative and accusative, especially inanimate ones like wall. So you often identify the object through context, verb meaning, and normal word order.

Also, Romanian uses pe before certain direct objects, especially people or highly specific animate objects, but not here:

• Văd băiatul. = I see the boy.
• Îl văd pe băiat. = I see the boy.
  (common with animate/specific objects)

But with peretele, no pe is used.

Because in Romanian, descriptive adjectives usually come after the noun.

So:

• peretele urât = the ugly wall

This is the most neutral, standard order.

English usually says the ugly wall, with the adjective before the noun. Romanian usually prefers:

• noun + adjective

Adjectives can sometimes come before the noun in Romanian, but that often sounds more emphatic, literary, or stylistically marked.

Because the adjective must agree with the noun it describes.

Here, peretele is:

• masculine
• singular

So the adjective is also masculine singular:

• urât = ugly

Compare:

• peretele urât = the ugly wall
• casa urâtă = the ugly house
• pereții urâți = the ugly walls
• casele urâte = the ugly houses

So the form of the adjective changes depending on the noun’s gender and number.

Yes, that is grammatical.

But adding noi changes the feel a little:

• Vedem peretele urât. = neutral, normal
• Noi vedem peretele urât. = we see the ugly wall
  (with extra emphasis on we)

Romanian often leaves out subject pronouns unless they are needed for:

• emphasis
• contrast
• clarity

Yes, Romanian word order is fairly flexible, but changes usually affect emphasis or style.

The most neutral version is:

• Vedem peretele urât.

If you move things around, the sentence may sound more marked or literary. For example, fronting the object often gives it special focus:

• Peretele urât îl vedem.
  = The ugly wall is what we see / It is the ugly wall that we see.

Notice that when the direct object is moved to the front, Romanian often also uses a matching clitic pronoun like îl.

So yes, word order can change, but the original sentence is the most straightforward version.

Yes, Romanian can put the adjective before the noun:

• urâtul perete

This can also mean the ugly wall, but it is less neutral than peretele urât. It can sound more expressive, stylistic, or literary.

So for everyday, plain description:

• peretele urât = the normal choice

This is a useful thing to notice in Romanian:

• after the noun = usually neutral
• before the noun = often more marked or expressive

A careful pronunciation is roughly:

• vedem = /veˈdem/
• peretele = /peˈretele/
• urât = /uˈrɨt/

Whole sentence:

• /veˈdem peˈretele uˈrɨt/

A few pronunciation notes:

• The stress is on -dem in vedem
• The stress is on -re- in peretele
• The stress is on the second syllable in urât
• The letter â represents a Romanian vowel /ɨ/, which does not have a direct English equivalent

That â sound is one of the sounds English speakers usually need to practice separately.