brood

worry, brood, care, fret

这些动词均有“烦恼、担忧”之意。
worry: 普通用词，着重使人焦虑、烦恼或深深不安。
brood: 语气比worry强，多指沉思、沮丧或忧郁。
care: 多指极强烈的关心和忧虑。常带纯客观的意味。
fret: 通常指因悲哀、焦虑或忧愁等所困扰的心理状态。

名词 brood:

1. the young of an animal cared for at one time

动词 brood:

1. think moodily or anxiously about something
   同义词：dwell
2. hang over, as of something threatening, dark, or menacing
   同义词：hover, loom, bulk large
3. be in a huff and display one's displeasure
   同义词：sulk, pout
4. be in a huff; be silent or sullen
   同义词：grizzle, stew
5. sit on (eggs)
   同义词：hatch, cover, incubate

1. Some insects produce seven or eight broods a year.
   有些昆虫一年产七八次卵。
2. It's no use brooding over one's past mistakes.
   老是抱着过去的错误是没用的。

brood

n.（名词）
The young of certain animals, especially a group of young birds or fowl hatched at one time and cared for by the same mother.
幼小的动物：某种幼小的动物，尤指一次孵出并由同一个母亲照料的一群雏鸟或雏禽
The children in one family.
家庭的所有孩子
v.（动词）
brood.ed,brood.ing,broods
v.tr.（及物动词）
To sit on or hatch (eggs).
坐在（蛋）上或孵（蛋）
To protect (young) by or as if by covering with the wings.
庇护：用或似用翅膀遮蔽来保护（雏儿）
v.intr.（不及物动词）
To sit on or hatch eggs.
坐在蛋上或孵蛋
To hover envelopingly; loom.
盘旋；隐约出现

To be deep in thought; meditate.
沉思；冥想
To focus the attention on a subject persistently and moodily; worry:
考虑：苦思冥想一个主题；担忧：
例句：
brooded over the insult for several days.
好几天都默想着受到的侮辱

To be depressed.
垂头丧气
adj.（形容词）
Kept for breeding:
为繁殖而饲养的：
例句：
a brood hen; a brood mare.
喂养下蛋的母鸡；饲养生马驹的母马

来源：
Middle English
中古英语
from Old English brôd * see bhreu-
源自 古英语 brôd *参见 bhreu-

【引伸】
brood.ingly
adv.（副词）
<参考词汇><同义词>brood,dwell,fret,mope,stew,worryThe central meaning shared by these verbs is .to turn over in the mind moodily and at length.:
这些动词共有的中心意思是.闷闷不乐地在脑海里长时间冥思苦想.：
例句：
brooding about his decline in popularity;
思忖着他的名望下降的原因；

例句：
dwelled on her defeat;
思索着她的失败；

例句：
fretting over the loss of their jobs;
担忧他们的失业；

例句：
moping about his illness;
牵挂着他的病；

例句：
stewing over her upcoming trial;
担心她即将到来的审判；

例句：
worrying about the unpaid bills. See also Synonyms at flock
挂虑着没付的帐单 参见同义词 flock