How to Say "stand-by" in Spanish
The Spanish word for “stand-by” is “suplente” — B2 level.
English → SpanishB2
adjectiveB2
ready to replace something

Examples
Tenemos una pieza suplente por si la original se rompe.
We have a spare part in case the original one breaks.
Buscamos una fecha suplente para el evento por si llueve.
We are looking for an alternative date for the event in case it rains.
La bombilla suplente está en el cajón.
The spare lightbulb is in the drawer.
Positioning
Like most adjectives, it usually comes after the noun it describes.
Plural agreement
Mistake: “Las piezas suplente.”
Correction: Las piezas suplentes. Even though the word doesn't change for gender, it must still be plural if the noun is plural.
Related Translations
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