Negative words in Japanese are formed by conjugation.
Conjugation is a method of inflicting a verb, nouns or adjectives into different states e.g. talk, talks, talked, talking etc.
In Japanese, transform nouns and adjectives into the negative using じゃない.
| 水じゃない |
| It’s not water |
| 元気じゃない |
| Is not well |
| 猫じゃない |
| It’s not a cat |