unfadable

adjective

un·​fad·​able

¦ən¦fādəbəl

1

: not subject to fading : fast, everlasting

a fabric of unfadable color

2

: incapable of being forgotten : memorable, deathless

an unfadable act of political courage

—Manchester Guardian Weekly

Word History

Etymology

un- entry 1 + fade + -able

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