soporific
Word family adjectivesoporiferoussoporificsoporoseadverbsoporiferouslynounsoporiferousnesssopor
sop·o·rif·ic /ˌsɒpəˈrɪfɪk◂ $ ˌsɑː-/ adjectiveadj formal SLEEPmaking you feel ready to sleep 使人昏昏欲睡的,催眠的 His voice had an almost soporific effect. 他的嗓音几乎有催眠作用。
Origin soporific (1600-1700) French soporifique, from Latin sopor “deep sleep”