aha
UK: ɑːˈhɑː | US: ɑˈhɑ
interj. an exclamation expressing sudden realization, triumph, or surprise
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"Aha" is an onomatopoeic exclamation imitating the sound of a sudden vocal reaction to discovery or insight. Its structure cannot be divided into morphemes, as it emerged naturally to mimic human expressive sounds. First recorded in Middle English, it mirrors similar interjections across languages (e.g., German "aha," French "ah ha"), reflecting universal vocal patterns for epiphany or amusement.
"Aha! I finally found my keys under the couch."
She shouted "Aha!" when she solved the puzzle.
"Aha, now I understand how this machine works."
The detective smiled and said, "Aha! This clue changes everything."
"Aha," he muttered, realizing his mistake too late.