寶ㄅㄠˇbǎo刀ㄉㄠdāo不ㄅㄨˋbù老ㄌㄠˇlǎo

  1. 比喻雖不如往昔強壯，但功夫、技藝猶不減當年。如：「他雖然年紀大了，但是寶刀不老，每次比賽照樣拿冠軍。」

英lit. a good sword always remains sharp (idiom)​, fig. (of one's skills etc)​ to be as good as ever, the old man still has it