Insomnia
来自Big Physics
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early 17th century: from Latin, from insomnis ‘sleepless’, from in- (expressing negation) + somnus ‘sleep’.
wiktionary
From Latin in-(“without”) + somnus(“sleep”, noun) + -ia.
etymonline
insomnia (n.)
"chronic inability to sleep," 1620s, insomnie, from Latin insomnia "want of sleep, sleeplessness," from insomnis "sleepless," from in- "not" (see in- (1)) + somnus "sleep" (from PIE root *swep- "to sleep"). The re-Latinized form is from 1758.
