Si sente fortunata.

Here, si sente means feels.

It comes from the verb sentirsi, which means to feel in the sense of describing your state or condition:

• Mi sento stanco = I feel tired
• Si sente fortunata = She feels lucky

Even though sentire by itself can also mean to hear, in this structure with si and an adjective, it means to feel.

Si is the reflexive pronoun used with sentirsi.

The verb is not just sentire here, but sentirsi:

• sentire = to hear / to feel something
• sentirsi = to feel, to feel oneself to be

So:

• sente alone could mean he/she hears
• si sente means he/she feels

In other words, si is part of the verb pattern learners need to remember.

By itself, Si sente fortunata most naturally means:

• She feels lucky, or
• You feel lucky, if speaking formally to a woman

Italian often leaves out the subject pronoun, so you have to work it out from context.

Because fortunata is feminine singular, the subject must be feminine:

• she
• or formal you addressed to a woman

Because Italian adjectives usually agree with the person they describe.

• fortunato = masculine singular
• fortunata = feminine singular
• fortunati = masculine plural / mixed plural
• fortunate = feminine plural

So fortunata tells you that the person who feels lucky is feminine.

Examples:

• Si sente fortunato = He feels lucky
• Si sente fortunata = She feels lucky

Italian often drops subject pronouns when they are not necessary. This is very common.

So instead of saying:

• Lei si sente fortunata

Italian often simply says:

• Si sente fortunata

The verb form and the context usually make the meaning clear enough. If the speaker wants to emphasize who it is, or avoid ambiguity, they can add lei.

Not exactly.

• Si sente fortunata = She feels lucky
• È fortunata = She is lucky

The first one focuses on her personal feeling or perception. The second one sounds more like a statement of fact or judgment.

Compare:

• Oggi si sente fortunata. = Today she feels lucky.
• È fortunata ad avere questi amici. = She is lucky to have these friends.

In some contexts, sentirsi can literally relate to perceiving oneself, but in a sentence like Si sente fortunata, that is not the natural interpretation.

Because si sente is followed by an adjective, Italian speakers understand it as she feels lucky, not she hears herself lucky.

So for learners, the safest reading here is simply feels.

Sente is the present indicative, third person singular, of sentire.

So the full structure is:

• si = reflexive pronoun
• sente = present tense, he/she feels

This makes Si sente fortunata a present-time statement: She feels lucky.

Yes, it can, if you is the formal Lei and the person being addressed is a woman.

Italian formal you uses third-person forms, so:

• Lei si sente fortunata = You feel lucky

If the subject is omitted, Si sente fortunata could still mean that in the right context.

Without context, though, many learners will first read it as She feels lucky.

The reflexive pronoun and adjective change depending on the subject.

Common forms:

• Mi sento fortunato / fortunata = I feel lucky
• Ti senti fortunato / fortunata = You feel lucky
• Si sente fortunato = He feels lucky
• Si sente fortunata = She feels lucky
• Ci sentiamo fortunati / fortunate = We feel lucky
• Vi sentite fortunati / fortunate = You all feel lucky
• Si sentono fortunati / fortunate = They feel lucky

So in your sentence, the feminine singular ending -a is an important clue.

Yes, very common.

Italian often uses sentirsi with adjectives to describe how someone feels:

• Mi sento bene = I feel well
• Si sente stanca = She feels tired
• Ti senti pronto? = Do you feel ready?
• Si sente fortunata = She feels lucky

So this sentence is a very natural and useful pattern to learn.

A simple pronunciation guide is:

see SEN-teh for-too-NAH-tah

A few points:

• Si sounds like see
• sente has the stress on the first syllable: SEN-te
• fortunata has the stress on na: for-tu-NA-ta

If you want to sound natural, say it smoothly as one phrase: Si sente fortunata.