Devo cucire un bottone sulla camicetta.

Devo means I must / I have to.

In Italian, the subject pronoun is often omitted because the verb ending already shows who the subject is.

• devo = I must
• devi = you must
• deve = he/she must

So Devo cucire... is perfectly natural and means I have to sew.... You could say Io devo..., but that usually adds emphasis, like I have to, not someone else.

Because after dovere (must / to have to), Italian normally uses another verb in the infinitive.

So the pattern is:

• dovere + infinitive
• devo cucire = I have to sew
• devo studiare = I have to study
• devo andare = I have to go

This works much like English have to + verb.

Cucire means to sew.

In this sentence, it means to sew on a button. Italian often uses just cucire where English might say sew on.

So:

• cucire un bottone = to sew a button
• in natural English, you would usually say to sew on a button

Bottone is a masculine singular noun, so it takes the masculine singular indefinite article un.

• un bottone = a button
• plural: bottoni = buttons

Compare:

• una camicetta = a blouse because camicetta is feminine
• un bottone = a button because bottone is masculine

Sulla is a combination of:

• su = on
• la = the

So:

• sulla camicetta = on the blouse

Italian often combines simple prepositions with definite articles:

• su + la = sulla
• su + il = sul
• a + la = alla
• in + il = nel

Here, sulla camicetta tells you where the button is being sewn: onto/on the blouse.

Italian often uses the definite article more broadly than English.

So la camicetta can mean:

• the blouse
• sometimes, depending on context, something closer to my blouse / the blouse in question

In many everyday sentences, Italian prefers the article where English might use a possessive or leave it more vague.

Not exactly.

• camicia = shirt
• camicetta = blouse

Camicetta usually refers to a lighter, typically women’s garment. It is a feminine noun:

• la camicetta
• una camicetta

So this sentence specifically refers to sewing a button onto a blouse, not just any shirt.

Yes, in some contexts, but it is slightly different.

• cucire un bottone focuses on the action of sewing
• attaccare un bottone means to attach a button

If you want to be very specific about using needle and thread, cucire is the clearest choice.

You may also hear:

• riattaccare un bottone = to reattach a button
• cucire un bottone sulla camicetta = to sew a button onto the blouse

Because un bottone is the direct object, and sulla camicetta is a prepositional phrase showing location.

The structure is:

• Devo = I have to
• cucire = sew
• un bottone = a button
• sulla camicetta = onto/on the blouse

This order is very normal in Italian: verb + object + place/location phrase

Yes, but the original order is the most neutral and natural.

Standard:

• Devo cucire un bottone sulla camicetta.

You could move parts around for emphasis, for example:

• Sulla camicetta devo cucire un bottone.

That sounds more marked, as if you are emphasizing on the blouse.

For everyday use, the original sentence is the safest choice.

A simple pronunciation guide is:

DEH-vo koo-CHEE-re oon bot-TOH-ne SOOL-la ka-mee-CHET-ta

A few useful notes:

• c before i in cucire sounds like ch in cheese
• tt in bottone and camicetta is pronounced more strongly than a single t
• stress is on:
  • DE-vo
  • cu-CI-re
  • bot-TO-ne
  • cami-CET-ta

By itself, it can mean either one. It simply says I have to sew a button onto the blouse.

If you specifically want to say sew a button back on / reattach a button, Italian might use:

• Devo riattaccare un bottone sulla camicetta.

But in many real situations, Devo cucire un bottone sulla camicetta is enough if the context is clear.