[ ahy-oh-puh-ner ]
/ ˈaɪˌoʊ pə nər /
an experience or disclosure that gives one a sudden realization or understanding: Her disclosures about her childhood were a real eyeopener.
a drink of liquor taken early in the day and intended to wake a person up fully.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019