Ti vesti con calma prima di uscire di casa.

Because vestirsi is a reflexive verb, meaning to get dressed or literally to dress oneself.

• ti = yourself / you (reflexive pronoun for tu)
• vesti = you dress

So:

• ti vesti = you get dressed

In Italian, reflexive verbs use a reflexive pronoun:

• mi vesto = I get dressed
• ti vesti = you get dressed
• si veste = he/she gets dressed

Without ti, vesti by itself would more naturally mean you dress (someone/something) rather than you get dressed.

Because vesti is the conjugated form of the verb for tu in the present tense.

The full infinitive is vestirsi = to get dressed.

Here is the breakdown:

• vestirsi = infinitive
• tu ti vesti = you get dressed

So in the sentence:

• ti = reflexive pronoun
• vesti = present tense, tu form

You would use vestirti in structures like:

• devi vestirti = you must get dressed
• voglio vestirti bene = I want to dress you well / I want you to dress well, depending on context

But in your sentence, the verb is already conjugated, so ti vesti is correct.

Because Italian usually omits subject pronouns when they are already clear from the verb form.

• (Tu) ti vesti = You get dressed

The ending -i in vesti already tells us the subject is tu.

Italian often leaves out io, tu, lui, lei, noi, voi, loro unless the speaker wants to add emphasis, contrast, or clarity.

For example:

• Ti vesti con calma = You get dressed calmly / You take your time getting dressed
• Tu ti vesti con calma, io no = You get dressed calmly, not me

Con calma literally means with calm, but in natural English it usually means:

• calmly
• slowly
• without rushing
• taking your time

So ti vesti con calma suggests that the person gets dressed in a relaxed, unhurried way.

It is a very common Italian expression. You can also hear it in other contexts:

• Parla con calma = Speak calmly
• Fallo con calma = Do it without rushing / Take your time doing it

Because after prima di (before), Italian normally uses an infinitive when the subject is the same.

So:

• prima di uscire = before going out / before leaving

This structure is very common:

• prima di mangiare = before eating
• prima di dormire = before sleeping
• prima di partire = before leaving

In your sentence, the person who gets dressed is also the person who goes out, so Italian uses:

• prima di + infinitive

If the subject changes, Italian often uses a full clause instead:

• prima che lui esca = before he goes out

They do two different jobs:

1. prima di uscire
   Here di belongs to the structure prima di + infinitive = before doing something

2. di casa
   Here di casa is part of the expression uscire di casa = to leave home / to go out of the house

So even though you see di twice, they are not the same grammatical use.

Because uscire di casa is a very common, idiomatic way to say:

• to leave home
• to go out of the house

In many everyday situations, Italians use di casa when talking about one’s home in a general sense.

Compare:

• uscire di casa = leave home / go out of the house
• essere fuori casa = be away from home

Dalla casa is more literal: from the house. It can sound more specific, as if you are talking about a particular building as a physical object, not simply home.

So:

• prima di uscire di casa sounds natural and idiomatic

You may also hear uscire da casa, which is also common in many contexts. But uscire di casa is a very standard expression.

This is an important distinction.

• vestire = to dress someone / to clothe / to wear, depending on context
• vestirsi = to get dressed

Examples:

• Vesto il bambino = I dress the child
• Mi vesto = I get dressed

So in your sentence, since the meaning is that you are dressing yourself, Italian uses the reflexive form:

• ti vesti

Yes, ti vesti is in the present tense.

Italian present tense can express several things that English often separates:

• a habit: You get dressed calmly before leaving home
• a general routine: You dress slowly before going out
• something happening now, depending on context: You’re getting dressed calmly before leaving home

Without more context, the sentence most naturally sounds like a habit, routine, or general description.

Yes, Italian word order is somewhat flexible, though some versions sound more natural than others.

The original sentence:

• Ti vesti con calma prima di uscire di casa.

is very natural.

Other possible orders include:

• Prima di uscire di casa, ti vesti con calma.
• Ti vesti prima di uscire di casa, con calma.
  This is possible, but less smooth in many contexts.

The original order flows well because it presents:

1. the action: ti vesti
2. the manner: con calma
3. the time relation: prima di uscire di casa

Sometimes yes, but not always exactly.

• slowly focuses on speed
• con calma focuses more on being calm, relaxed, or not in a rush

So depending on context, con calma could mean:

• calmly
• unhurriedly
• taking your time
• slowly

If you translate it only as slowly, you may lose the idea of relaxed behavior.

Yes, in many situations prima di uscire da casa would also be understood and can sound natural.

However, uscire di casa is a very common expression meaning to leave home. It often feels slightly more idiomatic when referring to one’s home as home, not just a physical building.

So:

• uscire di casa = very idiomatic, common
• uscire da casa = also common and understandable

The exact preference can vary depending on region, style, and context.