IPA: /ˈhæŋˌoʊvər/
KK: /ˈhæŋˌoʊvər/
The unpleasant physical effects that occur after drinking too much alcohol, often including headache, nausea, and fatigue.
After the party last night, I woke up with a terrible hangover.
Hangover → The word 'hangover' is formed from 'hang' (from Old English 'hangian', meaning to suspend or be suspended) and 'over' (meaning above or beyond). The term describes the state of being suspended in discomfort after drinking too much alcohol, hence the feeling that lingers over one after a night of drinking.
Think of the feeling of being 'suspended' ('hang') in discomfort 'beyond' ('over') a night of drinking — that's what a hangover means.