un·for·get·ta·ble /ˌʌnfɚ/ (a.)忘不了的,令人難忘的
Un·for·get·ta·ble a. Not forgettable; enduring in memory. Pungent and unforgettable truths. --Emerson. ◄ ►
unforgettable adj : impossible to forget [ant: forgettable]