Refrigeramos el recipiente hermético.

Refrigeramos is the first-person plural form of refrigerar, so it means we refrigerate, we are refrigerating, or sometimes we refrigerated.

A very important point: in Spanish, refrigeramos can be either:

• present: we refrigerate / we are refrigerating
• preterite: we refrigerated

The form is the same, so you need context to know which meaning is intended.

Spanish often drops subject pronouns because the verb ending already shows who is doing the action.

• refrigeramos = we refrigerate / we refrigerated

So nosotros is not necessary unless you want to add emphasis or contrast:

• Nosotros refrigeramos el recipiente hermético, no ellos.
  We refrigerate the airtight container, not them.

No. This is a common false friend.

• recipiente = container
• recipient = destinatario or receptor, depending on context

So el recipiente hermético means the airtight container, not the airtight recipient.

Because recipiente is a masculine noun in Spanish, even though it ends in -e.

So you say:

• el recipiente
• un recipiente

The ending -e does not automatically tell you whether a noun is masculine or feminine, so this is something you often have to learn with the word.

In Spanish, most adjectives normally come after the noun.

So:

• el recipiente hermético = the airtight container

This is the most neutral and natural order.
Putting the adjective before the noun is sometimes possible in Spanish, but it often changes the tone or sounds literary, emphatic, or unusual. Here, recipiente hermético is the standard order.

Here, hermético means airtight or sealed tightly.

So recipiente hermético is a very natural way to say:

• airtight container
• sealed container

Although English has the word hermetic, in normal everyday English you would usually say airtight instead.

You could, but it means something slightly different.

• refrigerar = to refrigerate, to keep something cold, usually by putting it in the fridge
• enfriar = to cool or make colder

So:

• Refrigeramos el recipiente hermético suggests putting it in refrigeration
• Enfriamos el recipiente hermético just means we cool the container down

If the idea is specifically putting it in the fridge, refrigeramos is the better match.

Using el means we are talking about a specific airtight container, one that is already known from the context.

• el recipiente hermético = the airtight container
• un recipiente hermético = an airtight container

So the sentence as written points to a particular container, not just any one.

A helpful approximate pronunciation is:

reh-free-heh-RAH-mos

A few key points for Spain Spanish:

• the r is a light tap in refrigeramos
• the g before e sounds like a throaty Spanish j
• the stress falls on ra: re-fri-ge-RA-mos

And hermético is pronounced roughly:

ehr-MEH-tee-ko

with the stress on mé.

Yes, it is grammatically correct and natural. It sounds a bit neutral or instructional, like something from a recipe, a lab procedure, or packaging instructions.

In everyday conversation in Spain, people might also say something more colloquial, such as:

• Metemos el recipiente hermético en la nevera.
  We put the airtight container in the fridge.

Also, in Spain, people often use táper colloquially for a food container, depending on the context. But recipiente hermético is perfectly good standard Spanish.

Yes. For many -ar verbs, the nosotros form is identical in the present and the preterite.

So refrigeramos can mean:

• we refrigerate / we are refrigerating
• we refrigerated

You usually know from:

• context
• time expressions
• the surrounding sentences

For example:

• Ahora refrigeramos el recipiente hermético.
  Now we refrigerate / are refrigerating the airtight container.

• Ayer refrigeramos el recipiente hermético.
  Yesterday we refrigerated the airtight container.