摩 ㄇㄛ ˊ mó 顶 ㄉㄧㄥ ˇ dǐng 放 ㄈㄤ ˋ fàng 踵 ㄓㄨㄥ ˇ zhǒng 摩 ㄇㄛ ˊ mó 頂 ㄉㄧㄥ ˇ dǐng 放 ㄈㄤ ˋ fàng 踵 ㄓㄨㄥ ˇ zhǒng to rub one's head and heels (idiom); to slave for the benefit of others to wear oneself out for the general good