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soporiferous

[ sop-uh-rif-er-uhs, soh-puh- ]
/ ˌsɒp əˈrɪf ər əs, ˌsoʊ pə- /
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adjective
bringing sleep; soporific.
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Origin of soporiferous

1580–90; <Latin sopōrifer (sopōr-, combining form of soporsopor + -i--i- + -fer-fer) + -ous

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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