Termin treaba azi.

Romanian often leaves out subject pronouns when the verb ending already makes the subject clear.

• termin = I finish
• termini = you finish
• termină = he/she finishes

So Termin treaba azi is completely natural without eu. You can add eu for emphasis:

• Eu termin treaba azi = I’m the one finishing the work today

Termin is the 1st person singular present tense of a termina (to finish, to complete).

A few present-tense forms:

• eu termin = I finish
• tu termini = you finish
• el/ea termină = he/she finishes
• noi terminăm = we finish
• voi terminați = you all finish
• ei/ele termină = they finish

So the speaker is saying that they finish it.

Treabă means work, task, or business.
Treaba is the definite form, meaning the work, the task, or sometimes the thing I have to do.

Romanian often uses the definite article attached to the end of the noun:

• treabă = work / a task
• treaba = the work / the task

So Termin treaba azi literally has the work/task, not just work in a general sense.

It can be understood either way depending on context.

Treabă is flexible and can mean:

• work
• task
• job to do
• business / matter

In Termin treaba azi, it usually means something like:

• I’m finishing the work today
• I’m finishing the task today
• I’ll get it done today

So the exact English word depends on the situation.

Yes, azi can move around. Romanian word order is fairly flexible.

All of these are natural:

• Termin treaba azi.
• Azi termin treaba.
• Treaba o termin azi. — more emphasis on the work

The version with azi at the end is a neutral, common order. Putting azi first often gives a little more emphasis to today.

Yes. Romanian very often uses the present tense for a near future or planned future, especially when there is a time word like azi (today).

So Termin treaba azi can mean:

• I’m finishing the work today
• I finish the work today
• I’ll finish the work today

The context decides which English translation sounds best.

Yes. Both mean today.

• azi = shorter, very common in speech
• astăzi = also very common, sometimes a bit more formal or fuller-sounding

So you could also say:

• Termin treaba astăzi.

Both are correct.

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

So:

• băiat = boy
• băiatul = the boy

and:

• treabă = work / task
• treaba = the work / the task

This is one of the big differences from English.

No. Pe is usually used with direct objects that are people or otherwise highly specific/animate objects.

Examples:

• Văd băiatul. = I see the boy.
• Îl văd pe băiat. = I see the boy.
  Here pe is used because it refers to a person.

But treaba is not a person, so you simply say:

• Termin treaba azi.

No pe is needed.

Yes, and that is very natural.

Îmi termin treaba azi means something like:

• I’m finishing my work today
• I’m getting my work done today

Here îmi adds the idea that it is my work / my task / my business. In many contexts, this sounds very idiomatic.

Compare:

• Termin treaba azi. = I finish the work / the task today.
• Îmi termin treaba azi. = I finish my work today.

They are similar, but a termina is usually the most common everyday verb for to finish.

• a termina = to finish, complete
• a sfârși = to finish, come to an end, end up; sometimes feels more literary or stylistically marked depending on context

For ordinary conversation about getting something done, a termina is usually the safest choice.

You put nu before the verb:

• Nu termin treaba azi.

This means:

• I’m not finishing the work today
• I won’t finish the work today
• I don’t finish the work today

Again, context determines the best English translation.

A simple pronunciation guide is:

• Termin ≈ tehr-MEEN
• treaba ≈ TRYA-ba or TREA-ba
• azi ≈ AHZ-ee

A few helpful notes:

• Romanian r is tapped or lightly rolled.
• The ea in treaba is a Romanian vowel combination, not quite like English ee-a.
• z in azi sounds like the z in zoo.

A rough full pronunciation might be:

• tehr-MEEN TRYA-ba AHZ-ee

Yes. It is a perfectly complete Romanian sentence.

It has:

• a verb: termin
• a direct object: treaba
• a time expression: azi

Romanian often allows short, compact sentences like this, especially in everyday speech.