at death's door

1. 生命危在旦夕
   They were very distressed to hear that their beloved uncle was at death's door.

   得知他们爱戴的伯父生命危在旦夕，他们很悲伤。

Death pays all debts/scores.

1. 一死百了。

put to death

1. 处死
   The criminals were put to death.

   这些罪犯被处死。

to death

1. 极度
   He was tired to death after a day's work.

   工作了一天他累得要死。

• as sure as death
  quite certain.
• at death's door
  so ill that one may die.
• be the death of someone
  cause someone's death.
• be in at the death
  be present when a hunted animal is caught and killed.
  ▸be present when something fails or ends.
• catch one's death (of cold)
  informal catch a severe cold.
• do someone to death
  kill someone.
• do something to death
  repeat something so frequently that it becomes tedious.
• like death warmed up (or N. Amer. over)
  informal extremely tired or ill.
• put someone to death
  execute someone.
• to death
  
  1. until dead.
  2. used to emphasize a feeling or action:
     I'm sick to death of you.