French Etymology From Latin sopor (“sleep”) + -fique. Pronunciation IPA(key): /sɔ.pɔ.ʁi.fik/ Audio:(file) Adjective soporifique (plural soporifiques) soporific Noun soporifique m (plural soporifiques) a soporific See also somnifère Further reading “soporifique”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.Wikiwand - on Seamless Wikipedia browsing. On steroids.