IPA: /ɪnˈɛfəsəbl/
KK: /ɪnˈɛfəsəbl/
Something that cannot be erased or removed; it leaves a lasting mark or impression.
The memories of that day were ineffaceable, forever etched in her mind.
Ineffaceable → It is formed from "in-" (meaning not), "efface" (from Latin "effacere", meaning to erase or wipe out), and "-able" (meaning capable of). The word "ineffaceable" means not capable of being erased or wiped out.
Think of something that cannot be 'erased' ('efface') and is 'not' ('in-') capable of being removed — that's what ineffaceable means.