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English definition of “unforgettable”

unforgettable

adjective  /ˌʌn·fərˈɡet̬·ə·bəl/ us  
(of an experience) having such a strong effect or influence on you that you cannot forget it: One unforgettable morning, we were among the elephants, perfectly situated to watch their descent to the river.
(Definition of unforgettable from the Cambridge Academic Content Dictionary © Cambridge University Press)
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