put to sleep
Verb
Meaning
kill gently, as with an injection
help someone go to bed
Source: WordNetSynonyms
Antonyms
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Examples
the cat was very ill and we had to put it to sleep
Mother put the baby to sleep
Bethany said Shearer's breathing became progressively worse in his final days and the family made the painful decision to have him put to sleep.
Ricky wants an army and is intent on finding the lost souls Morris and co. freed rather than put to sleep.
“Let us refuse to be put to sleep by the blackness of the night,” the ARREST Gloria statement further read.
Zoo owners feared the animals may have to be put to sleep if suitable homes could not be found.