Indelible means impossible to rub out or to forget. Indelible ink, an indelible impression, indelible memories.
Indelible ink is a real product used to mark voters in elections, where a stain lasting days prevents anybody voting twice. The figurative use is the commoner, and an indelible impression is one nothing since has covered over.
1adjectiveindelibleImpossible to rub out or to forget.
“The war left an indelible mark on everyone who lived through it.”
indelible is a quality.
Latin indelebilis means not able to be destroyed, from in- plus delere, to erase.
Latin
indēlēbilis — indestructible
English, today
indelible
From Latin indēlēbilis (“indestructible”). by surface analysis, in- + delible.
Etymology from Wiktionary, CC BY-SA