Learn Polish: Przygotowujemy śniadanie, chociaż nikt nie jest głodny. - We are preparing breakfast, although nobody is hungry.

This shows the imperfective suffix in action! The perfective (completed action) verb for "to prepare" is przygotować. To make it imperfective (an ongoing action like "we are preparing"), we add the suffix -ywać to create przygotowywać. When you conjugate verbs ending in -ywać, that suffix changes to -uj- in the present tense, giving us przygotowujemy.

Why does the sentence say nikt nie jest (nobody not is) instead of just nikt jest?

Polish strictly requires double negation. Whenever you use a negative pronoun like nikt (nobody), nic (nothing), or nigdy (never) in a sentence, you must also put the negative particle nie right before the verb.

Why is the adjective głodny in the masculine form if nikt means "nobody"?

Grammatically, the pronouns nikt (nobody) and ktoś (somebody) are treated as masculine singular nouns. Because of this rule, any adjectives or past tense verbs connected to them must always take the standard masculine endings, like głodny.

Is śniadanie in the nominative or accusative case here?

It is in the accusative case because it is the direct object of the verb (it is the thing being prepared). However, because śniadanie is a neuter noun, its accusative form is identical to its basic dictionary (nominative) form, so the ending doesn't change.