lasting, ineradicable, colorfast, permanent, unforgettable, continue, unerasable, enduring, fast.
He went to the desk, picked up a pad of cable blanks and an indelible
That was the one and only time that he spoke with Lincoln, and it remains an indelible
It was a tremendous folly no less than an indelible
crime, for it steeled the heart of every Protestant to avenge his slaughtered brethren.