La panceta está tierna.

Because estar is commonly used for states or conditions, especially with food.

• La panceta está tierna = the panceta is tender
• This suggests its current texture, for example after cooking.

If you said es tierna, it would sound more like you are describing tenderness as a more general or inherent quality, which is much less natural here. With food texture, Spanish usually prefers estar:

• Está rica
• Está dura
• Está cruda
• Está tierna

Because tierna agrees with la panceta, which is a feminine singular noun.

In Spanish, adjectives usually match the noun in gender and number:

• el pollo tierno
• la panceta tierna
• los filetes tiernos
• las verduras tiernas

So:

• panceta = feminine singular
• therefore tierna = feminine singular

Because panceta is a feminine noun in Spanish, so it takes the feminine article la.

• la panceta
• not el panceta

This is something you mostly have to learn with the noun. The ending -a often suggests a noun is feminine, and in this case it is.

In Spain, panceta usually refers to pork belly or belly bacon. Depending on the context, it may be:

• fresh pork belly
• salted or cured pork belly
• a cut of meat used in cooking
• sometimes something close to what English speakers think of as bacon, though not always exactly the same

So if you are thinking of English bacon, be careful: panceta and bacon are related ideas, but they are not always perfect equivalents.

No. Tierno / tierna can have different meanings depending on context.

With food:

• tierna = tender, soft to eat

With people, animals, or behavior:

• tierno / tierna can mean sweet, affectionate, or adorable

For example:

• La carne está tierna = The meat is tender.
• Qué niño tan tierno = What a sweet/adorable child.

So in La panceta está tierna, the food meaning is the one that applies.

Yes. In Spanish, descriptive adjectives like tierna are very commonly placed after the noun:

• la panceta tierna
• la carne dura
• el pescado fresco

In your sentence, though, the adjective comes after the verb because the structure is:

• Subject: La panceta
• Verb: está
• Adjective: tierna

So this is not really about adjective position inside a noun phrase; it is a sentence with estar + adjective.

Grammatically, yes, but in most everyday contexts it is less natural than está tierna.

• Está tierna focuses on the panceta’s current condition
• Es tierna would sound more like a general characteristic, which is unusual for a specific piece of food in front of you

If you are talking about how a type of meat generally tends to be, Spanish may still often prefer other wording, for example:

• La panceta suele quedar tierna = Panceta usually turns out tender.

So for describing food you are eating or cooking, está tierna is the best choice.

A Spain Spanish pronunciation would be approximately:

lah pahn-THEH-tah ehs-TAH tee-EHR-nah

A few notes:

• La = short lah
• panceta = pan-CE-ta, with ce pronounced like th in much of Spain
• está = stress on the second syllable: es-TÁ
• tierna = starts with a kind of tye sound: TYER-na

If you speak Latin American Spanish, ce would usually sound like s, so panceta would sound more like pan-SE-ta.

Yes. Spanish often drops the subject when it is clear from context.

So if everyone already knows you are talking about the panceta, you can simply say:

• Está tierna.

This is very natural in conversation, especially while cooking or eating.

Most often, yes. Saying está tierna usually describes the texture after cooking, or at least after checking how soft the meat is.

For example:

• while roasting
• after frying
• when tasting it
• when deciding whether it needs more cooking

It can also be used in other contexts where tenderness matters, but the most common interpretation is about food texture.

Yes. Spanish uses many adjectives with estar to describe food. For example:

• La panceta está dura = The panceta is tough/hard.
• La panceta está crujiente = The panceta is crispy.
• La panceta está salada = The panceta is salty.
• La panceta está rica = The panceta is tasty.
• La panceta está cruda = The panceta is raw.

This is a very common pattern:

• noun + estar + adjective

So La panceta está tierna is a very useful model sentence.