1. brood over : (气氛)笼罩, 念念不忘, 计较(特指忿恨不满)；
及物动词
不及物动词
名词
1. 一窝幼雏
A brood is a group of baby birds that were born at the same time to the same mother.
2. （某人的)一群孩子，家中所有的子女
You can refer to someone's young children as their brood when you want to emphasize that there are a lot of them.
3. 沉思；苦思冥想
If someone broods over something, they think about it a lot, seriously and often unhappily.
1. the young of an animal cared for at one time