词根词缀：somni-, somno-, somn-, -somnia, -somniac
【来源及含义】Latin: sleep, sleeping; dreams, dreaming
【相关词根词缀】 Related "sleep" units: dorm-; hypno-; letho-; narco-; oneiro- (dream); sopor-.
【同源单词】cacosomnia, dyssomnia, dyssomniac, dyssomniac, hypersomnia, hypersomniac