Niedzielny obiad u babci jest zawsze pyszny.

Niedzielny means Sunday in the sense of related to Sunday.

It comes from the noun niedziela = Sunday.

So:

• niedziela = Sunday
• niedzielny obiad = Sunday lunch / Sunday dinner

It is an adjective, so it describes obiad.

This is a very common question, because obiad does not match English meal words perfectly.

In Polish, obiad usually means the main cooked meal of the day, often eaten in the afternoon. Depending on the family and culture, that may be translated as:

• lunch
• dinner

So Niedzielny obiad could be understood as:

• Sunday lunch
• Sunday dinner

Both can be reasonable translations depending on the context.

U is used when you mean at someone's home / at someone's place.

So:

• u babci = at grandma’s place
• u mamy = at mom’s place
• u kolegi = at a male friend’s place

By contrast, w usually means in or inside something:

• w domu = in the house / at home
• w kuchni = in the kitchen

So here u babci does not mean physically inside grandma as a person, of course. It means at grandma’s house/home.

Because the preposition u requires the genitive case.

The base form is:

• babcia = grandma

After u, it changes to:

• u babci = at grandma’s place

So this is a case change:

• nominative: babcia
• genitive: babci

This is one of the most useful patterns to learn early, because u + genitive is very common in Polish.

Obiad is in the nominative case, because it is the subject of the sentence.

The sentence structure is basically:

• Niedzielny obiad u babci = the Sunday meal at grandma’s place
• jest = is
• zawsze pyszny = always delicious

So the thing being described is obiad, and that is why it stays in the nominative.

Because pyszny has to agree with obiad.

Obiad is:

• masculine
• singular
• nominative

So the adjective also has to be:

• masculine
• singular
• nominative

That gives:

• pyszny

Compare:

• obiad → pyszny
• zupa → pyszna
• danie → pyszne

This agreement between noun and adjective is a core feature of Polish grammar.

Jest means is.

It is the 3rd person singular form of być = to be.

So:

• jest pyszny = is delicious

In this sentence, jest links the subject (Niedzielny obiad u babci) with the description (pyszny).

In a normal standard sentence like this, you should keep jest.

So:

• Niedzielny obiad u babci jest zawsze pyszny. = correct, natural

If you remove jest:

• Niedzielny obiad u babci zawsze pyszny.

that sounds incomplete or very colloquial/elliptical, not like the normal full sentence a learner should produce.

So for standard Polish, keep jest here.

Yes, Polish word order is fairly flexible, and zawsze can appear in different places.

The original sentence:

• Niedzielny obiad u babci jest zawsze pyszny.

is very natural.

You could also hear:

• Niedzielny obiad u babci zawsze jest pyszny.

Both are acceptable. The difference is mostly about rhythm and emphasis, not basic meaning.

In general:

• jest zawsze pyszny sounds very natural
• zawsze jest pyszny is also natural

A learner can safely use the original version.

No, Polish word order is more flexible than English word order.

The sentence given is a neutral, natural way to say it:

• Niedzielny obiad u babci jest zawsze pyszny.

But Polish can move parts around for emphasis, for example:

• U babci niedzielny obiad jest zawsze pyszny.
• Zawsze pyszny jest niedzielny obiad u babci.

These alternatives are possible, but they may sound more marked, poetic, or emphasis-driven.

For a learner, the original version is the best default choice.

No. Polish does not use articles like English a/an and the.

So obiad can mean:

• a meal
• the meal

depending on context.

In this sentence, English usually needs an article, but Polish does not:

• Niedzielny obiad u babci jest zawsze pyszny.
• Sunday lunch at grandma’s is always delicious.

The meaning is understood from context rather than from articles.

It can suggest either, depending on context, but this sentence most naturally sounds like a general truth or repeated experience:

• Sunday lunch at grandma’s is always delicious.

The word zawsze = always strongly suggests a repeated situation, not just one single Sunday.

So the sentence most naturally means that this is something that happens regularly.

Not here.

In this sentence, babci is a common noun, so it stays lowercase:

• u babci

You would normally capitalize it only if you were using it like a name in direct address or as a personal family title in certain contexts, for example in a letter or message:

• Kocham Cię, Babciu. = I love you, Grandma.

But in the sentence given, lowercase is correct.