IPA: /əˈɡrɪp.ni.ə/
KK: /əˈgrip.ni.ə/
A condition where a person cannot sleep, leading to a constant state of wakefulness and lack of rest.
The patient was diagnosed with agrypnia after weeks of sleepless nights.
Agryphnia is derived from "a-" (meaning without) and "grypnia" (from Greek "grypnos", meaning sleep). The term refers to a condition characterized by the absence of sleep.
Think of 'without' ('a-') and 'sleep' ('grypnos') to remember that agrypnia means a lack of sleep.