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."
双语例句
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.
当生活很艰难，你想要放弃的时候，请记住，生活充满了起起落落，如果没有低谷，那站在高处也失去了意义。
来自
2. Talent, hard work and sheer tenacity are all crucial to career success.
事业要成功，才能、勤奋和顽强的意志都至关重要。
来自柯林斯例句
3. The federal government hiked the tax on hard liquor.
联邦政府提高了烈性酒的税率。
来自柯林斯例句
4. People are having to think hard about their holiday plans.
人们现在得仔细地琢磨自己的度假计划。
来自柯林斯例句
5. Many parents find it hard to discourage bad behaviour.
