Cannot be removed or erased:
— An indelible stain.
— Indelible memories.

synonym: unerasable.

Roget 550: indicating etc. v., indicative, indicatory; denotative, connotative; diacritical, representative, typical, symbolic, pantomimic, pathognomonic^†, symptomatic, characteristic, demonstrative, diagnostic, exponential, emblematic, armorial; individual etc. (special) 79.    known by, recognizable by; indicated etc. v.; pointed, marked.    [Capable of being denoted] denotable^†; indelible.    ... show more

Roget 505: remembering, remembered etc. v.; mindful, reminiscential^†; retained in the memory etc. v.; pent up in one's memory; fresh; green, green in remembrance; unforgotten, present to the mind; within one's memory etc. n.; indelible; uppermost in one's thoughts; memorable etc. (important) 642.    ... show more

Roget 150: unchangeable, immutable; unaltered, unalterable; not to be changed, constant; permanent etc. 141; invariable, undeviating; stable, durable; perennial etc. (diuturnal) 110^†.    fixed, steadfast, firm, fast, steady, balanced; confirmed, valid; fiducial^†; immovable, irremovable, riveted, rooted; settled, established etc. v.; vested; incontrovertible, stereotyped, indeclinable.    tethered, anchored, moored, at anchor, on a rock, rock solid, firm as a rock; firmly seated, firmly established etc. v.; deep-rooted, ineradicable; inveterate; obstinate etc. 606.    transfixed, stuck fast, aground, high and dry, stranded.    [movable object rendered unmovable] stuck, jammed; unremovable; quiescent etc. 265; deterioration etc. 659.    indefeasible, irretrievable, intransmutable^†, incommutable^†, irresoluble^†, irrevocable, irreversible, reverseless^†, inextinguishable, irreducible; indissoluble, indissolvable^†; indestructible, undying, imperishable, incorruptible, indelible, indeciduous^†; insusceptible, insusceptible of change.    ... show more

Roget 821: feeling etc. v.; sentient; sensuous; sensorial, sensory; emotive, emotional; of feeling, with feeling etc. n.. warm, quick, lively, smart, strong, sharp, acute, cutting, piercing, incisive; keen, keen as a razor; trenchant, pungent, racy, piquant, poignant, caustic.    impressive, deep, profound, indelible; deep felt, home felt, heartfelt; swelling, soul-stirring, deep-mouthed, heart-expanding, electric, thrilling, rapturous, ecstatic.    earnest, wistful, eager, breathless; fervent; fervid; gushing, passionate, warm-hearted, hearty, cordial, sincere, zealous, enthusiastic, glowing, ardent, burning, red-hot, fiery, flaming; boiling over.    pervading, penetrating, absorbing; rabid, raving, feverish, fanatical, hysterical; impetuous etc. (excitable) 825.    impressed with, moved with, touched with, affected with, penetrated with, seized with, imbued with etc. 82; devoured by; wrought up etc. (excited) 824; struck all of a heap; rapt; in a quiver etc. n.; enraptured etc. 829.    ... show more

Polish: nieusuwalny