Word
Ten materiał nie jest odporny na wodę i sól.
Meaning
This material is not resistant to water and salt.
Part of speech
sentence
Pronunciation
Course
Questions & Answers about Ten materiał nie jest odporny na wodę i sól.
Why do we use the preposition na here, and what case does it trigger?
The adjective odporny (resistant or immune) mandates the preposition na, which in this phrase requires the Accusative case. Just like you learn "resistant to" in English, you must memorize odporny na as a set phrase in Polish. The preposition's case applies to both wodę and sól.
If na requires the Accusative case, why does woda change to wodę but sól stays the same?
Both words are actually in the Accusative case! Woda is a standard feminine noun ending in -a, so its Accusative ending is -ę. However, sól is a feminine noun that ends in a consonant. For feminine nouns ending in a consonant, the Accusative form is always identical to the Nominative form.
Since the sentence is negative (nie jest), shouldn't the nouns switch to the Genitive case due to the Genitive of negation?
No, because the Genitive of negation rule only affects direct objects of verbs. In this sentence, wodę i sól are not the direct object of a verb; they belong to the preposition na. Prepositions strictly enforce their required case (here, the Accusative) regardless of whether the main verb is affirmative or negative.
Can odporny na be used for people and abstract things, or is it only for physical materials?