Non voglio una sigaretta.

In Italian, the usual way to make a verb negative is to put non directly before the conjugated verb.

• voglio = I want
• non voglio = I do not want

So Non voglio una sigaretta follows the normal Italian pattern for negation.

Voglio is the first person singular present tense form of volere, which means to want.

The present tense of volere starts like this:

• io voglio = I want
• tu vuoi = you want
• lui/lei vuole = he/she wants
• noi vogliamo = we want
• voi volete = you all want
• loro vogliono = they want

So voglio specifically means I want.

Italian often uses an article where English may or may not use one. Here, una means a or one, so una sigaretta means a cigarette.

Using una sounds natural when referring to a single cigarette as an item.

• Voglio una sigaretta = I want a cigarette
• Non voglio una sigaretta = I do not want a cigarette

If you removed una, the sentence would usually sound less natural in this context.

Because sigaretta is a feminine singular noun.

Italian indefinite articles change according to gender:

• un for many masculine singular nouns
• una for feminine singular nouns

Examples:

• un libro = a book
• una casa = a house
• una sigaretta = a cigarette

Since sigaretta is feminine, una is the correct article.

A very common clue in Italian is the noun ending.

Many singular nouns ending in -a are feminine:

• casa
• strada
• sigaretta

And many singular nouns ending in -o are masculine:

• libro
• ragazzo

This is not a perfect rule, but it works often. Since sigaretta ends in -a, it is feminine, so it takes una.

Yes, you can. Italian often leaves out subject pronouns because the verb ending already shows who the subject is.

• Non voglio una sigaretta = normal and natural
• Io non voglio una sigaretta = also correct, but more emphatic

Adding io can stress I:

• Io non voglio una sigaretta; lui sì.
  = I do not want a cigarette; he does.

So the version without io is usually the default.

Non voglio una sigaretta is the most neutral and standard order.

Italian word order is somewhat flexible, but changing it usually adds emphasis or sounds more literary or conversational in a specific way. For learners, it is best to use:

• Non + verb + object

So:

• Non voglio una sigaretta

That is the safest and most natural version in ordinary speech.

Not necessarily. It simply means I do not want. The strength depends on tone and context.

It can sound:

• neutral
• firm
• polite
• blunt

For example:

• Non voglio una sigaretta = plain statement
• No, grazie, non voglio una sigaretta = more polite
• Non voglio! = much stronger, depending on tone

So the grammar itself is neutral; the tone comes from how it is said.

You could, but it would sound more formal or less natural in everyday conversation.

• non voglio = normal, everyday I do not want
• non desidero = more formal, more like I do not desire / I do not wish

In a simple spoken situation, Non voglio una sigaretta is much more natural.

Yes, grammatically una can mean either a or one, depending on context. In this sentence, it will usually be understood as the ordinary indefinite article a.

If you strongly wanted to emphasize the number one, Italian would normally stress it in speech or use context to make that clear.

So in Non voglio una sigaretta, learners should understand una mainly as a.

The plural of sigaretta is sigarette.

So:

• Non voglio una sigaretta = I do not want a cigarette
• Non voglio sigarette = I do not want cigarettes / I do not want any cigarettes

Notice that in the plural, Italian often drops the indefinite article in this kind of sentence.

No. Una stays una.

In Italian, some articles combine with prepositions, but that is not happening here. Also, while una can become un' before a feminine noun starting with a vowel, sigaretta starts with s, so it remains:

• una sigaretta

Not:

• un sigaretta
• un' sigaretta

It is pronounced approximately see-gah-RET-tah.

A few useful points:

• g before a is a hard g
• the double tt is pronounced more strongly than a single t
• the stress falls on -ret-

So the rhythm is roughly:

• si-ga-RET-ta

Listening and repeating is especially helpful with double consonants like tt.