名詞 doomsday:

1. (New Testament) day of the Last Judgment when God will decree the fates of all men according to the good and evil of their earthly lives
   同義詞：Judgment Day, Judgement Day, Day of Judgment, Day of Judgement, Last Judgment, Last Judgement, Last Day, day of reckoning, crack of doom, end of the world
2. an unpleasant or disastrous destiny
   同義詞：doom, day of reckoning, end of the world

1. This work will take me till doomsday.
   這工作要花我一輩子的時間。

dooms.day

n.（名詞）
Judgment Day.
末日審判

來源：
Middle English domesday
中古英語 domesday
from Old English dômes dôg
源自 古英語 dômes dôg
dôm [judgment] * see doom
dôm [審判] *參見 doom
dôg [day] * see day
dôg [日子] *參見 day