Somn=sleep,表示“睡眠”"
insomnia n 失眠症(in不+somn+ia病)
insomnious a 失眠的(in+somn+ious)
somnambulate v 梦游(somn+ambul走+ate)
somniloquy n 梦话(somni+loquy 说→睡着说话)
somniferous a 催眠的(somni+fer带来+ous→带来睡眠的)
somnolent a 困倦的(somn+olent…的→睡眠的)