insomnia
noun
- inability to sleep peacefully
Wiktionary
Pronunciation: /ɪnˈsɒmniə/
noun
Etymology: Borrowed from Latin īnsomnia, from Latin in- (“without”) + somnus (“sleep”, noun) + -ia, equivalent to in- + somn- + -ia.
- A sleeping disorder that is known for its symptoms of unrest and the inability to sleep.
“My mother suffers from insomnia.”
“It’s also possible for insomnia to be caused by restless leg syndrome.”
- Temporary inability to sleep.