Submitted by György Chityil ... on Fri, 01/19/2018 - 20:16 Hierarchy: VerbDescription: {{euphemistic}} To kill an animal painlessly, often with an injection; to euthanize.Ngram: put to sleepNgram Text: put to sleepSource: WiktionaryIssue: 0Wiktionary tag: euphemisticNgram Count: 3