Czech adjective declensions change the ending of a describing word to match the noun it describes.

This grammar rule tells us how a word functions inside a sentence.

This system becomes much easier to grasp once you divide adjectives into two main groups.

I’ll break down exactly how to change these word endings step by step.

What are adjective declensions?

In English, adjectives never change their spelling.

A “new car” and a “new house” both use the exact same word for “new”.

Czech grammar works very differently.

A Czech adjective must always agree with the noun it’s attached to.

You have to change the end of the adjective based on three things.

First, you must know the gender of the noun (masculine, feminine, or neuter).

Second, you must know the number (singular or plural).

Third, you must know the case (how the word is used in the sentence).

When you change the ending of the adjective to match these three things, you’re “declining” it.

The two main types of Czech adjectives

You don’t have to guess what ending an adjective needs.

Czech adjectives fall into two very specific categories.

These categories are called “hard adjectives” and “soft adjectives”.

You can easily tell them apart by looking at their basic dictionary form.

The basic dictionary form is always the masculine singular nominative version of the word.

Once you know if an adjective is hard or soft, you simply follow a set pattern for its endings.

Hard adjectives in Czech

Hard adjectives are the most common type of describing words in Czech.

In their dictionary form, they end in -ý for masculine nouns.

They end in -á for feminine nouns and -é for neuter nouns.

A perfect example is the word nový, which means “new”.

Here’s the complete declension table for a hard adjective in the singular form.

If you want to say “I have a new car”, you need the accusative case because the car is the direct object.

The Czech word for car is auto, which is a neuter noun.

Looking at the table above, the neuter accusative form of nový is nové.

If you want to say “I see a new woman”, you also need the accusative case.

The Czech word for woman is žena, which is a feminine noun.

The table shows that the feminine accusative form of nový is novou.

Soft adjectives in Czech

Soft adjectives are much easier to remember.

In their basic dictionary form, they end in -í for all three genders.

A very common soft adjective is moderní, which means “modern”.

Because they end in -í for masculine, feminine, and neuter nouns, their declension table is very simple.

Here’s the complete declension table for a soft adjective in the singular form.

Notice how many of the boxes just say moderní.

If you want to say “I’m reading a modern book”, you need the accusative case.

The Czech word for book is kniha, which is a feminine noun.

The table shows that the feminine accusative form stays exactly the same.

However, if the noun is a living male person or animal, the ending changes in the accusative case.

The Czech word for man is muž, which is a masculine animate noun.

The table shows that the masculine animate accusative form becomes moderního.

Practicing your declensions

Learning these tables takes time and repetition.

You shouldn’t try to memorize the entire table on your first day.

Focus completely on the Nominative (Case 1) and Accusative (Case 4) forms first.

These two cases are used for the subject and direct object of almost every basic sentence.

Once you’re comfortable with those, move on to the Genitive (Case 2) and Locative (Case 6) forms.