Lasciamo essiccare la brocca finché non è pronta per il forno.

It can be either, depending on context.

Lasciamo is the 1st person plural form of lasciare. So it can mean:

• we leave / we let
• let’s leave / let’s let

In an instructional or procedural context, Italian often uses this form the way English uses let’s. So the sentence may sound like an instruction shared with the listener, not necessarily a statement about what we are doing.

Because Italian often uses lasciare + infinitive to mean to let something happen or to leave something to do something.

So:

• lasciare essiccare = to let dry
• lasciare raffreddare = to let cool
• lasciare riposare = to let rest

In this sentence, lasciamo essiccare la brocca means that we are leaving the jug alone so that it can dry out.

Both relate to drying, but they are not exactly the same.

• asciugare usually means to dry, often in a general or everyday sense
• essiccare is more specific and often suggests drying out thoroughly, sometimes in a more technical or controlled way

With pottery, clay, or materials that need to become properly dry before going into a kiln, essiccare sounds very natural. It suggests more than just wiping off moisture from the surface.

No. In this structure, the non is not a real negative in English terms.

After finché meaning until, Italian very often uses non even though the meaning is still simply until:

• Aspetta finché non arriva = Wait until he arrives
• Lasciamo essiccare la brocca finché non è pronta = Let’s leave the jug to dry until it is ready

So here non is part of a common Italian pattern and does not mean the sentence is negative.

Because pronta agrees with la brocca, which is a feminine singular noun.

Agreement in Italian works like this:

• il vaso è pronto
• la brocca è pronta

Since brocca is feminine singular, the adjective must also be feminine singular: pronta.

The subject is understood to be la brocca.

Italian often leaves subject pronouns out when they are clear from the context. This is very normal. So instead of saying something like essa è pronta, Italian usually just says:

• è pronta

The meaning is still clearly it is ready, with it referring to the jug.

Per il forno means for the oven/kiln or ready to go into the oven/kiln.

Here, per expresses destination or intended use:

• pronto per il forno = ready for the oven/kiln

By contrast, al forno often means something like in the oven, oven-baked, or at/to the oven, depending on context. For example:

• pasta al forno = baked pasta

So pronta per il forno is the natural choice when you mean that the object has reached the stage where it can be put into the oven or kiln.

In everyday Italian, forno usually means oven. But in a context involving clay, pottery, or ceramics, it can also refer to a kiln.

So if the broader context is pottery-making, a learner should understand forno here as the firing oven, that is, the kiln.

Yes, that word order is possible, but Lasciamo essiccare la brocca is very natural.

Italian allows some flexibility with verb + infinitive structures. In this sentence, placing la brocca after essiccare sounds smooth and idiomatic.

So:

• Lasciamo essiccare la brocca
• Lasciamo la brocca essiccare

Both can work, but the first version is especially common in procedural or instructional language.

Here, finché means until.

It introduces the point in time at which the action stops:

• we leave the jug to dry
• this continues until it is ready for the kiln

So finché non è pronta marks the end point of the drying process.