indelible
in-DEL-uh-buladjMeaning impossible to erase, remove or forget
Memory hook in-DELETE-able: you can’t DELETE it. Theo’s marker drawing won’t wash off the wall, no matter how hard Dad scrubs: you can’t delete it. The ink is indelible.
Theo drew on the wall with indelible marker, and no amount of scrubbing helped.
In context Meeting the astronauts left an indelible impression on Maya; twenty years later, she could still recall every word they said.
Similar permanent, lasting, unforgettable, ineradicable
Opposite erasable, temporary, fleeting
From Latin indelebilis: in (not) + delere (to wipe out), the root of delete.