1540s, "condition of being a lunatic," formed in English from lunatic + -cy. Originally in reference to intermittent periods of insanity, such as were believed to be triggered by the moon's cycle. The Old English equivalent was monaðseocnes "month-sickness."
双语例句
1. "That's lunacy," he blustered.
“那真是疯了，”他吼道。
来自柯林斯例句
2. It's sheer lunacy driving in such weather.
天气这样糟糕还开车，真是疯了。
来自《权威词典》
3. It remains lunacy to produce yet more coal to add to power stations' stockpiles.
煤越产越多，而发电站的煤堆越来越高，这始终是愚蠢的行为。
来自柯林斯例句
4. O'Brien had tortured him to the edge of lunacy.
奥勃良快把他折磨到了神经错乱的地步.
来自辞典例句
5. This is sheer cock - eyed lunacy, absolute lunacy.
