mercy noun - Definition, pictures, pronunciation and usage notes
https://www.oxfordlearnersdictionaries.com/us/definition/english/mercy
WEB[countable, usually singular] (informal) an event or a situation to be grateful for, usually because it stops something unpleasant. It is a mercy (that)… It's a mercy she wasn't seriously hurt. His death was a mercy (= because he was in great pain). see also merciful, merciless. Word Origin. Idioms. at the mercy of somebody/something.
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