How to Say "overshadowing" in Spanish
The Spanish word for “overshadowing” is “eclipse” — B2 level.
English → SpanishB2
nounB2
losing importance or being outshined

Examples
El éxito de la nueva canción supuso el eclipse de su carrera anterior.
The success of the new song meant the overshadowing of his previous career.
La crisis política provocó un eclipse de los valores democráticos.
The political crisis caused a decline of democratic values.
Su fama sufrió un eclipse repentino tras el escándalo.
His fame suffered a sudden decline after the scandal.
Showing what is hidden
Use 'de' after eclipse to show who or what is losing their shine: 'el eclipse de su fama'.
Avoid 'por'
Mistake: “El eclipse por su rival.”
Correction: El eclipse de su rival. Use 'de' to describe the person or thing undergoing the decline.
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