| 词源 |
soporific adj."tending to produce sleep," 1680s, from French soporifique (17c.), formed in French from Latin sopor (genitive soporis) "deep sleep" (from PIE root *swep- "to sleep"). As a noun, "substance or medication which induces sleep," from 1722. Earlier as an adjective was soporiferous (1580s as "characterized by excessive sleep," c. 1600 as "soporific"); soporous "causing deep sleep" also is from 1680s.. updated on March 20, 2023 |