noun
change; alteration; modification
Refers to the way something changes or the state of having changed; often used to describe a noticeable transformation or difference.
彼の変わりようには驚いた。
I was surprised at how much he had changed.
この町の変わりようは目を見張るものがある。
The transformation of this town is remarkable.
変化 is a general term for change or variation, while 変わりよう emphasizes the manner or degree of change, often with a sense of surprise or evaluation.
変わり方 is a more neutral way to say 'way of changing', while 変わりよう often carries a nuance of the extent or striking nature of the change.
Derived from the verb 変わる (to change) with the suffix よう (様), indicating manner or state. The exact historical development is straightforward, but the word is a modern formation.