How to Say "detrimental" in Spanish
The Spanish word for “detrimental” is “perjudicial” — B2 level.
English → SpanishB2
adjectiveB2
formal or technical settings

Examples
Fumar es perjudicial para la salud.
Smoking is harmful to your health.
El ruido excesivo es perjudicial para los oídos.
Excessive noise is damaging to the ears.
Estas medidas son perjudiciales para la economía local.
These measures are detrimental to the local economy.
One size fits all
This word doesn't change based on gender. You can use it for 'masculine' things like 'un hábito' (a habit) or 'feminine' things like 'una dieta' (a diet) without changing the ending.
Making it plural
To talk about multiple harmful things, simply add '-es' to the end: 'perjudiciales'.
Wrong Preposition
Mistake: “perjudicial a la salud”
Correction: perjudicial para la salud
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