reducing
reduction
https://source.unsplash.com/featured/?reducing#.png
/suto3/google.iconreducing
/suto3/Google画像検索.iconreducing
/suto3/Google定義検索.icon reducing
/suto3/wikipedia.iconreducing
/suto3/weblio.icon reducing
/suto3/kotobank.icon reducing
/suto3/jisho.icon reducing