Indelible

Adjective

 * 1) having the quality of being difficult to remove, wash away, blot out, or efface;
 * 2) incapable of being canceled, lost, or forgotten.
 * This ink spot on the contract is indelible.
 * This stain on my shirt is indelible.
 * That horrible story just might make an indelible impression on the memory.
 * 1) incapable of being annulled

Thesaurus
absorbing, acute, colorfast, constant, deathless, deep, deep-dyed, deep-felt, deepgoing, double-dyed, dyed-in-the-wool, enduring, fadeless, fast, fixed, haunting, heartfelt, homefelt, immortal, imperishable, impregnable, incorruptible, indestructible, ineffaceable, ineradicable, inexpugnable, inextinguishable, ingrain, ingrained, invincible, invulnerable, keen, lasting, nagging, nonperishable, obsessive, penetrating, permanent, persistent, pervading, piercing, poignant, profound, quenchless, recurrent, sharp, undampable, undestroyable, undying, unerasable, unfading, unforgettable, unquenchable

Etymology
indelebilis "indestructible"

Translations

 * Bosnian:
 * Dutch:
 * Finnish: lähtemätön, häviämätön, unohtumaton
 * French:
 * German: unauslöschlich
 * Italian: indelebile
 * Manx: neunaardagh


 * Polish: niezmywalny
 * Portuguese: indelével
 * Serbian:
 * Cyrillic: неизбрисив
 * Roman: neizbrisiv
 * Spanish: indeleble