How to Say "unhealthy" in Spanish
The most common Spanish word for “unhealthy” is “enfermo” — use 'enfermo' when referring to something that is bad for your physical health or when describing someone who is physically ill.
enfermo
en-FER-moenˈfeɾmo

Examples
Comer demasiada azúcar es malo para tu salud, es poco saludable.
Eating too much sugar is bad for your health, it's unhealthy.
Hoy no voy a la escuela porque estoy enfermo.
I'm not going to school today because I'm sick.
Mi gato ha estado enfermo toda la semana.
My cat has been ill all week.
Tiene una mente enferma y retorcida.
He has a sick and twisted mind.
Matches the Person/Thing it Describes
This word changes to match if you're talking about someone masculine, feminine, or a group. enfermo (masculine), enferma (feminine), enfermos (masculine plural), enfermas (feminine plural).
Use 'estar' for Being Sick
To say someone is sick right now, you almost always use the verb estar. For example, Él está enfermo. (He is sick). It describes a temporary state or condition.
Using 'ser' instead of 'estar'
Mistake: “Mi padre es enfermo.”
Correction: Mi padre está enfermo. Using 'ser' makes it sound like being sick is a permanent part of his identity, which is very rare. For the temporary state of being sick, always use 'estar'.
Forgetting to Match Gender
Mistake: “Mi hermana está enfermo.”
Correction: Mi hermana está enferma. Because 'hermana' is feminine, the word describing her must also end in '-a'.
enfermizo
en-fer-MEE-soheɱfeɾˈmiθo

Examples
Tienen una relación enfermiza basada en los celos.
They have an unhealthy relationship based on jealousy.
Siente una curiosidad enfermiza por los crímenes reales.
He has a morbid curiosity about true crimes.
Su perfeccionismo es enfermizo.
His perfectionism is obsessive/unhealthy.
Abstract Use
When used with abstract nouns like 'amor' or 'curiosidad', it translates best as 'unhealthy' or 'morbid' rather than 'physically sick'.
Word Order
Physical vs. Mental Health
Related Translations
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