名詞 insomnia:

1. an inability to sleep; chronic sleeplessness

1. A trademark used for a hypnotic drug prescribed for insomnia.
   鹽酸氟胺安定商標(biāo)名，用于為失眠而指定的安眠藥
2. Lately he has been moaning about his insomnia and headache.
   他近來(lái)一直訴說(shuō)自己患了失眠和頭痛癥。

in.som.ni.a

n.（名詞）
Chronic inability to fall asleep or remain asleep for an adequate length of time.
失眠：長(zhǎng)期不能入睡或維持相當(dāng)長(zhǎng)一段時(shí)間不能入睡

來(lái)源：
Latin
拉丁語(yǔ)
from onsomnis [sleepless]
源自 onsomnis [無(wú)睡眠的]
in- [not] * see in-
in- [不] *參見 in-
somnus [sleep] * see swep-
somnus [睡覺(jué)] *參見 swep-