eye-opener
nounUK /ˈaɪˌəʊpənə/
US /ˈaɪˌoʊpənər/
Something that surprises you and makes you understand something new.
The trip to the animal shelter was a real eye-opener for the children.
RELATED WORDS
OTHER MEANINGS
2. A drink of alcohol taken early in the morning.
He poured himself an eye-opener before heading to work.
3. Something that wakes you up or makes you feel alert.
A cold shower is a great eye-opener in the morning.
4. A surprising fact or event that changes your view.
Reading the report was an eye-opener about how much waste we produce.