knock-down

n. 撞到, 击倒, 拆除, 击落
adj. 不可抵抗的, 压倒一切的, 强有力的

例句与用法：

Even though they weren't expecting us, they managed to knock up a marvellous meal.

他们虽然没想到我们要来，但还是设法匆匆做好一顿丰盛的饭。

Would you please knock me up at 7 o'clock?

请7点钟敲门把我叫醒行吗?