Transformation
Noun and する verb
へんか
コウイチは、天こうの変化にとてもびん感で、雨の日はよくへん頭痛をわずらっています。
Koichi is very sensitive about changes in the weather and he often gets migraines on rainy days.
十年前におとずれた時とくらべて、東京はずいぶんと変化しましたね。
Tokyo has changed a lot since I visited ten years ago.
うわ！すごいね。既に変化が現れているのが分かるよ。
Wow! This is amazing! I can see the change already.
Change and change equals even more change.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.