Guardamos la cuchilla de panadero.

Because Spanish often leaves out subject pronouns when they are not needed.

• Guardamos already tells you the subject is we
• The ending -amos marks first person plural

So Spanish can simply say Guardamos... instead of Nosotros guardamos...

You could add nosotros for emphasis or contrast, but normally it is omitted:

• Nosotros guardamos la cuchilla de panadero, no ellos.

Guardamos comes from guardar, which can mean:

• to keep
• to store
• to put away
• sometimes to save

With a physical object like la cuchilla, the most natural ideas are:

• we put away the baker’s blade
• we keep/store the baker’s blade

A very important grammar point: guardamos can be either:

• present tense: we keep / we put away
• preterite: we put away / we stored

For -ar verbs, the we form is the same in these two tenses.

So by itself, Guardamos la cuchilla de panadero is ambiguous. Context tells you which one is meant.

Because cuchilla and cuchillo are related but not the same word.

• cuchillo = knife
• cuchilla = blade

Cuchilla often suggests a blade rather than a whole knife, or a specific kind of cutting tool/blade.

It is also a feminine noun, so it takes:

• la cuchilla

not

• el cuchilla

Because its grammatical gender is feminine. In Spanish, nouns have gender, and you have to learn it with the word.

So:

• la cuchilla
• una cuchilla

Even if the object itself is not biologically female, the noun is still grammatically feminine.

Here de panadero describes the type or association of the blade.

It can mean something like:

• for a baker
• used by a baker
• baker’s

So la cuchilla de panadero is understood as the baker’s blade or the baker blade, depending on context.

This is a common Spanish pattern:

• gorro de cocinero = cook’s hat / chef hat
• zapatos de niño = children’s shoes / shoes for a child

Because de panadero is being used in a more general, descriptive way.

• de panadero = baker-style / baker’s / for a baker
• del panadero = of the baker or belonging to the baker

So the difference is roughly:

• la cuchilla de panadero = a blade associated with bakers, a baker’s blade
• la cuchilla del panadero = the blade belonging to a specific baker

That is why leaving out the article changes the meaning.

Panadero is the masculine form meaning baker.

• panadero = male baker / the general dictionary form
• panadera = female baker

In phrases like de panadero, Spanish often uses the masculine form in a general or neutral way when talking about a type of object or profession.

If you were specifically talking about something belonging to a female baker, you might say something different depending on the meaning, for example:

• la cuchilla de la panadera = the female baker’s blade

Yes, guardar can sometimes mean save, but the exact meaning depends on context.

Examples:

• guardar dinero = to save money / keep money
• guardar un archivo = to save a file
• guardar una herramienta = to put away / store a tool

In your sentence, because the object is la cuchilla, the most natural meaning is put away, store, or keep, not digital save.

Because that is the normal word order in a basic Spanish sentence:

• verb + object

So:

• Guardamos la cuchilla de panadero.

This is very similar to English:

• We put away the baker’s blade.

Spanish can change word order for emphasis, but the version you have is the neutral, standard order.

Yes. La guardamos means We put it away or We keep it, where la replaces la cuchilla.

Compare:

• Guardamos la cuchilla de panadero. = We put away the baker’s blade.
• La guardamos. = We put it away.

In Spanish, object pronouns often replace a noun once it is already known from context.

A simple guide is:

gwar-DA-mos la koo-CHEE-ya de pa-na-DE-ro

A few useful points:

• gua in guardamos sounds like gwa
• c before u sounds like a hard k
• ll in cuchilla is usually pronounced like y in much of Spain
• Stress falls on:
  • guarDAmos
  • cuCHIlla
  • panaDEro

So the rhythm is:

guarDAmos la cuCHIlla de panaDEro