She was indefinably depressed as they walked homeward.是什么意思？

She was indefinably depressed as they walked homeward.

当他们走上归途时,她却莫名其妙地变得消沉了.

she

pron. 她，它；

例句
Her lover walked out on her after she had aborted their child.
她的情人在她打掉胎儿后甩了她。

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

indefinably

adv. 无法下定义地，不明确地；

例句
She was indefinably depressed as they walked homeward.
当他们走上归途时,她却莫名其妙地变得消沉了.

depressed

adj. 情绪低落的，沮丧的，萧条的，下陷的，低的，中间凹下的；v. 压下(depress的过去式和过去分词)，使愁苦，降低（价格），使跌价；

例句
I was a bit depressed by our apparent lack of progress...
我对我们看似缓慢的进展感到有些沮丧。

as

adv. 同样地，一样地，例如；prep. 作为，以…的身份，如

例句
As far as I can recall, Patti was a Smith.
我记得帕蒂是姓史密斯的。

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

walked

v. 走，步行，散步( walk的过去式和过去分词 )，（鬼魂）出现，陪伴…走，徒步旅

例句
Her lover walked out on her after she had aborted their child.
她的情人在她打掉胎儿后甩了她。

homeward

adv. 向家，向本国；adj. 向家的，向本国的；

例句
She is ready for her homeward journey.
她准备好踏上返家之程了。