for pity's sake

1. 务请
   For pity's sake be quiet for a moment and let me finish my paper.

   请安静一会，让我把论文写好。

have/take pity on

1. 怜悯
   The old lady often takes pity on small animals.

   那位老太太常常怜悯小动物。

more's the pity

1. 遗憾
   I won't be able to come to dinner today, more's the pity.

   今天我不能赴晚宴，十分遗憾。

out of pity

1. 出于怜悯
   I don't want anybody to help me out of pity.

   我不要任何人出于怜悯来帮助我。

• for pity's sake
  informal used to express impatience or make an urgent appeal.
• more's the pity
  informal used to express regret.