mercy killing

名词 mercy killing:

1. the act of killing someone painlessly (especially someone suffering from an incurable illness)
   同义词：euthanasia

1. Mr Smith indicted for the mercy killing of his incurable son.
   史密斯先生被指控的罪名是他为了结束他那患不治之症的儿子的痛苦把他杀死了。