Ineffaceable

прилагательное 1) нестираемый, несмываемый 2) незабываемый, неизгладимый Синоним(ы): indelible

Большой англо-русский словарь

Ineffaceable

adjective Etymology: probably from French ineffaçable, from Middle French, from in- + effaçable effaceable not effaceable; ineradicable • ineffaceability noun • ineffaceably adverb

Merriam-Webster's Collegiate Dictionary