unforgettable

US /ˌʌn.fɚˈɡet̬.ə.bəl/
UK /ˌʌn.fɚˈɡet̬.ə.bəl/
"unforgettable" picture
1.

inoubliable

impossible to forget; very memorable.

:
It was an unforgettable experience.
C'était une expérience inoubliable.
Her performance was truly unforgettable.
Sa performance était vraiment inoubliable.