Questions & Answers about Керамика хрупкая.
In Russian, the verb to be is usually left out in the present tense.
So:
- Керамика хрупкая. = Ceramic/Ceramics is fragile.
- Literally, it is more like Ceramic fragile.
This is completely normal Russian. If you wanted the past or future, you would use forms of быть:
- Керамика была хрупкой. = The ceramic was fragile.
- Керамика будет хрупкой. = The ceramic will be fragile.
Because it has to agree with керамика.
Керамика is:
- feminine
- singular
- nominative
So the adjective also has to be feminine singular nominative, which gives хрупкая.
Compare:
- хрупкий — masculine
- хрупкая — feminine
- хрупкое — neuter
- хрупкие — plural
Russian adjectives change their endings to match the noun they describe.
The dictionary form is хрупкий.
Russian dictionaries usually list adjectives in the masculine singular nominative form. So you look up хрупкий, even if in the sentence you see хрупкая.