harebrained
adj. 轻率的
You use hare-brained to describe a scheme or theory which you consider to be very foolish and which you think is unlikely to be successful or true.
This isn't the first hare-brained scheme he's had.
这已经不是他制定的第一个愚蠢方案了。
1. very foolish;
How could I leave my loving, erratic, harebrained mother to fend for her herself?
我怎么可以撇下我可爱 、 古怪 、 率性的母亲,让她独自一人去生活 呢 ?