Somn=sleep,表示“睡眠”
insomnia n 失眠癥(in不+somn+ia病)
insomnious a 失眠的(in+somn+ious)
somnambulate v 夢(mèng)游(somn+ambul走+ate)
somniloquy n 夢(mèng)話(somni+loquy 說(shuō)→睡著說(shuō)話)
somniferous a 催眠的(somni+fer帶來(lái)+ous→帶來(lái)睡眠的)
somnolent a 困倦的(somn+olent…的→睡眠的)