Lunatic
Lunatic 既可以作名词也可以作形容词：
- 名词: 指精神失常的人或行为极其疯狂、危险的人。
- 形容词: 描述某人精神错乱，或者某项计划、行为极其愚蠢、疯狂（如 a lunatic idea）。
- “Only a lunatic would drive that fast in this thick fog.” (只有疯子才会在这么浓的大雾里开那么快。)
- “The proposal was dismissed as a lunatic scheme by the committee.” (该提议被委员会斥为疯狂的计划。)
- “He’s a complete lunatic on the football pitch.” (他在足球场上简直是个彻底的疯子。)
- lun-: 词根源自拉丁语 luna，意为“月亮”。
- -atic: 形容词后缀，表示“属于……的”或“具有……性质的”。
这个词反映了古代的一种迷信，即月亮（luna）的变化会引起周期性的精神错乱或癫狂（也就是“月亮病”）。虽然现代医学已经否定了这种联系，但这个词在语言中保留了下来。在现代语境中，作为名词使用时通常带有贬义或非正式色彩。
- 名词形式: lunacy (疯狂，精神失常)
- 副词形式: lunatically
联想 Luna（月亮女神）。想象一个人对着月亮发疯，这就是 lunatic 的来源。
In ancient times, people believed that the full moon made people crazy. When a man started dancing on his roof at midnight, his neighbors whispered, “He is a lunatic, possessed by the moon!” Today, we call anyone with a wild and dangerous idea a lunatic, even if the moon is hidden by clouds.