1. ag(e)ing
    • 外国語の勉強は頭の老化を防ぐ
    • Learning a foreign language 「prevents our minds from growing old [helps keep our minds young].
    • 男性のほうが女性よりも早く老化する
    • Men age more rapidly than women.
  1. 老化遺伝子a senescent gene
  1. 老化現象(a symptom of) senility [siníləti]; the aging process