also hardheaded, 1580s, "stubborn," from hardhead "dull person" (1510s), from hard (adj.) + head (n.). Meaning "practical, shrewd" is attested from 1779. Compare Dutch hardhoofdig "stupid."
雙語例句
1. When life gets hard and you want to give up, remember that life is full of ups and downs, and without the downs, the ups would mean nothing.