indelible
Concise Oxford English Dictionary © 2008 Oxford University Press:
indelible /ɪnˈdɛlɪb(ə)l/
▶adjective
- 1 (of ink or a mark) unable to be removed.
- 2 unable to be forgotten.
– derivatives
indelibility noun,
indelibly adverb.
indelibility noun,
indelibly adverb.
– origin C15 (as indeleble): from Fr., or from L. indelebilis, from in- ‘not’ + delebilis (from delere ‘efface, delete’).
'indelible' also found in these Oxford entries:

