ineffaceably

One thing is certain, the language was ineffaceably stamped upon my brain, though for a long time no one knew it, least of all myself.

"Rubashov, Rubashov..." that last cry was branded ineffaceably in his acoustic memory.

His thinking processes, once so phlegmatic and logical, had become ineffaceably scarred; and it was pitiful to note his response to certain chance allusions such as "Friday", "tomb", "coffin", and words of less obvious concatenation.

Her hair is already gray with many cares and crosses; her first-born son is dying in these weeks: black falsehood has ineffaceably soiled her name; ineffaceably while this generation lasts.

It was the fatal flaw of humanity, which Nature, in one shape or another, stamps ineffaceably on all her productions, either to imply that they are temporary and finite, or that their perfection must be wrought by toil and pain.