Asamblăm fotoliul.

Asamblăm is a verb form. It comes from the infinitive a asambla = to assemble.

The ending -ăm tells you it is:

• 1st person plural
• present tense

So the verb itself already means we assemble or we are assembling.

Romanian often leaves out subject pronouns when they are clear from the verb ending.

In asamblăm, the ending already shows we, so noi is not necessary.

You could say Noi asamblăm fotoliul, but that would usually add emphasis, something like we are the ones assembling the armchair.

In Romanian, the definite article is usually attached to the end of the noun instead of standing as a separate word.

So:

• fotoliu = armchair
• fotoliul = the armchair

This is one of the big differences from English.

Fotoliu is a neuter noun in Romanian.

Romanian neuter nouns behave:

• like masculine in the singular
• like feminine in the plural

So in the singular definite form you get fotoliul.
This masculine-looking pattern is normal for neuter singular nouns.

It can mean either one, depending on context.

Romanian present tense often covers both:

• a general/habitual meaning: we assemble
• an action happening now: we are assembling

If the context is about what is happening right now, English would often translate it as we are assembling the armchair.

Because the subject is not stated, it is very natural for the sentence to begin with the verb.

Romanian word order is more flexible than English word order.
Asamblăm fotoliul is perfectly natural.

You could also say:

• Noi asamblăm fotoliul = We are assembling the armchair

But the version without noi is shorter and very common.

Ă is a separate Romanian letter, not just a decorated a.

It represents a short central vowel, somewhat like the vowel sound in the second syllable of English sofa.
So asamblăm is not pronounced with a normal a at the end.

For learners, the important point is:

• a and ă are different sounds
• they can change the form and pronunciation of a word

You add nu before the verb:

Nu asamblăm fotoliul.

That means We are not assembling the armchair or We do not assemble the armchair, depending on context.

Yes, in some contexts.

• a asambla focuses on assembling something from parts
• a monta can mean to install, to put together, or to mount

For furniture instructions, a asambla is very natural when you mean putting the armchair together from pieces. A monta may also be possible, but it can sound a bit broader depending on context.

It is the direct object of the verb, so it is in the accusative function.

In this sentence:

• asamblăm = the action
• fotoliul = the thing being assembled

For many Romanian nouns, the nominative and accusative forms look the same, so you identify the role mainly from the sentence structure and meaning.