Word familyadjectivemerciablemercifulmercilessadverbmercifullymercilesslynounmercifulnessmercilessnessmercy killingmercyverbmercify
ˈmercy ˌkilling noun [countableC, uncountableU]
KILLthe act of killing someone who is very ill or old so that they do not have to suffer anymore 安乐死(术),无疼痛致死SYN euthanasia
Examples from the Corpus
mercy killing• So this would almost be a mercy killing.• Frankly, it would have been a mercy killing.• Among those receiving probation orders will be those for whom the section 2 defence is used to mitigate a mercy killing.