変わる
かわる (kawaru)
to change, to be altered
verb (godan)
Example
季節が変わると、服装も変わります。
きせつがかわると、ふくそうもかわります。
Kisetsu ga kawaru to, fukusou mo kawarimasu.
When the seasons change, clothing also changes.
This intransitive verb pairs with 変える (kaeru) which means 'to change something.' Very useful for describing natural changes and transformations.