Nici nu negociez, nici nu cumpăr ceainicul.

It is the Romanian pattern for neither ... nor.

So Nici nu negociez, nici nu cumpăr ceainicul is built as two parallel negative parts:

• nici nu negociez = neither do I negotiate
• nici nu cumpăr ceainicul = nor do I buy the teapot

Romanian often repeats the full negative structure in both halves.

Because nu is the normal marker that negates a finite verb in Romanian.

With verbs, nici does not usually replace nu. Instead, nici adds the neither/nor idea, while nu is still the actual verbal negation.

That is why standard Romanian says:

• Nici nu negociez, nici nu cumpăr...

not normally:

• Nici negociez, nici cumpăr...

So you can think of nici as the linker, and nu as the negative particle attached to the verb.

Yes, nici can also mean not even in other contexts.

For example:

• Nici nu știu. = I do not even know.

But in your sentence, because it appears as a pair — nici ... nici — it is functioning as neither ... nor, not just not even.

So:

• single nici can sometimes mean not even
• paired nici ... nici means neither ... nor

They are both 1st person singular present tense forms, meaning I negotiate / I am negotiating and I buy / I am buying.

Their dictionary forms are:

• a negocia = to negotiate
• a cumpăra = to buy

Conjugation here:

• (eu) negociez = I negotiate
• (eu) cumpăr = I buy

So the sentence is speaking about I, even though the pronoun is not stated.

Romanian often leaves out subject pronouns when they are already clear from the verb ending. This is very common.

Because negociez and cumpăr already show 1st person singular, the listener knows the subject is I.

So:

• Nici nu negociez, nici nu cumpăr ceainicul.

already means:

• I neither negotiate nor buy the teapot.

You can add eu for emphasis or contrast:

• Eu nici nu negociez, nici nu cumpăr ceainicul.

That would sound more like As for me, I neither negotiate nor buy the teapot.

In Romanian, the definite article is usually attached to the end of the noun, not written as a separate word like English the.

So:

• ceainic = teapot
• ceainicul = the teapot

Here the definite article is -ul, attached to ceainic.

This is a very important Romanian pattern:

• băiat = boy
• băiatul = the boy
• oraș = city
• orașul = the city

So ceainicul literally means teapot-the, but in normal English we say the teapot.

Yes. In this sentence, ceainicul is the direct object of cumpăr, so it is functioning as an accusative.

However, in Romanian, many nouns have the same form for nominative and accusative, especially in the singular.

So:

• Ceainicul e pe masă. = The teapot is on the table.
  Here it is the subject.

• Cumpăr ceainicul. = I buy the teapot.
  Here it is the direct object.

Same form, different grammatical role.

Yes, that is grammatical and understandable.

But there is a difference in feel:

• Nu negociez și nu cumpăr ceainicul = I do not negotiate and I do not buy the teapot
• Nici nu negociez, nici nu cumpăr ceainicul = I neither negotiate nor buy the teapot

The nici ... nici version is the more direct and natural equivalent of English neither ... nor. It sounds more balanced and often a bit more emphatic.

Romanian present tense can cover both ideas, depending on context.

So:

• nu negociez can mean I do not negotiate or I am not negotiating
• nu cumpăr can mean I do not buy or I am not buying

Romanian does not usually need a separate continuous form like English does. Context tells you whether the meaning is habitual, general, or happening right now.

Yes. It can connect nouns, adjectives, and other parallel elements too.

Examples:

• Nici cafea, nici ceai. = Neither coffee nor tea.
• Nici mare, nici mic. = Neither big nor small.
• Nici aici, nici acolo. = Neither here nor there.

The important thing is this:

• when finite verbs are involved, Romanian normally keeps nu with each verb
• when you are linking nouns or adjectives, there is no verb to negate, so you just use nici ... nici

Because the sentence contains two coordinated clauses:

• Nici nu negociez
• nici nu cumpăr ceainicul

They are parallel clauses linked by the correlative pattern nici ... nici, so a comma is natural and standard in writing.

It helps show the pause and the balance between the two parts.