soporifically (ˌsopoˈrifically) or soporiferously (ˌsopoˈriferously)
adverb
soporiferous in American English
(ˌsɑpəˈrɪfərəs, ˌsoupə-)
adjective
bringing sleep; soporific
Derived forms
soporiferously
adverb
soporiferousness
noun
Word origin
[1580–90; ‹ L sopōrifer (sopōr-, comb. form of soporsopor + -i--i- + -fer-fer) + -ous]This word is first recorded in the period 1580–90. Other words that entered Englishat around the same time include: bomb, piggyback, reference, scramble, stigma-ous is a suffix forming adjectives that have the general sense “possessing, full of”a given quality (covetous; glorious; nervous; wondrous); -ous and its variant -ious have often been used to Anglicize Latin adjectives with terminations that cannotbe directly adapted into English (atrocious; contiguous; garrulous; obvious; stupendous). As an adjective-forming suffix of neutral value, it regularly Anglicizes Greekand Latin adjectives derived without suffix from nouns and verbs; many such formationsare productive combining forms in English, sometimes with a corresponding nominalcombining form that has no suffix (as -fer and -ferous; -phore and -phorous; -pter and -pterous; -vore and -vorous)