褪せる[あせる] (aseru)

その本ほんの表紙ひょうしは色いろがあせています

The colors on the cover of this book have faded.

日光にっこうで看板かんばんの文字もじがあせた。

The sun had faded the lettering on the sign.

この路線対立は、その後の辛亥革命や対米移民問題、第1次世界大戦などで対外硬が度々再燃して、結果的には対外的にはその方向に向かいながらも、「対外硬」という言葉が色褪せる原因となっていった。

In the confrontation between two groups, the Taigaiko was reactivated due to the Xinhai Revolution, the immigration issue against the United States, or the First World War, and although they were led to the same direction externally, the word of 'Taigaiko' faded away.