名詞 eternity:

1. time without end
   同義詞：infinity
2. a state of eternal existence believed in some religions to characterize the afterlife
   同義詞：timelessness, timeless existence
3. a seemingly endless time interval (waiting)

1. The dull play seemed to last an eternity.
   這場乏味的劇似乎演個(gè)沒完沒了。
2. He gave her an eternity ring when their son was born.
   他們的兒子出世後他送給她一枚表示永恒的戒指。
3. It seemed an eternity before news of his safety reached her.
   他平安的消息到達(dá)她那里之前，那段時(shí)間似乎是無限漫長的。

e.ter.ni.ty

n.（名詞）
【復(fù)數(shù)】 e.ter.ni.ties
Time without beginning or end; infinite time.
永恒：無開端或結(jié)尾的時(shí)間；無限的時(shí)間
The state or quality of being eternal.
不朽：永恒的狀態(tài)或性質(zhì)

The timeless state following death.
永生
The afterlife; immortality.
來世；永存
A very long or seemingly endless time:
漫長的時(shí)間：一段漫長或似乎無終止的時(shí)間：
例句：
waited in the dentist`s office for an eternity.
在牙醫(yī)的辦公室里無休止的等待

來源：
Middle English eternite
中古英語 eternite
from Old French
源自 古法語
from Latin aeternit3s
源自 拉丁語 aeternit3s
from aeternus [eternal] * see eternal
源自 aeternus [永恒，永遠(yuǎn)，永存] *參見 eternal