How to Say "undying" in Spanish
The Spanish word for “undying” is “inmortal” — B1 level. This is a very common word in everyday Spanish.

Examples
Los dioses griegos son inmortales.
The Greek gods are immortal.
Su música se ha convertido en un legado inmortal.
His music has become an immortal legacy (a legacy that will never die).
El amor verdadero es inmortal.
True love is everlasting.
Adjective Agreement
Since 'inmortal' ends in a consonant ('l'), it uses the same form for masculine and feminine nouns. It only changes in the plural: 'la leyenda inmortal' / 'las leyendas inmortales'.
Confusing 'Inmortal' and 'Eterno'
Mistake: “Sometimes learners use 'inmortal' when they mean 'eternal' (e.g., 'el tiempo es inmortal').”
Correction: Use 'eterno' (eternal) for things that have no beginning or end, like time or the universe. Use 'inmortal' for beings or legacies that cannot die.
Related Translations
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