somnifacient

== English == === Etymology === From Latin somnus (“sleep”) + facio (“to make”). === Pronunciation === IPA(key): /ˌsɑm.nəˈfeɪ.ʃənt/ === Adjective === somnifacient Inducing or causing sleep. === Noun === somnifacient (plural somnifacients) Any pharmaceutical product that causes sleep.