How to Say "social ill" in Spanish
The Spanish word for “social ill” is “enfermedad” — B2 level.
English → SpanishB2
nounB2formal
a widespread, deep-rooted problem

Examples
La desigualdad es la enfermedad de nuestra sociedad.
Inequality is the social ill of our society.
El escritor describió la corrupción como una enfermedad que consume al gobierno.
The writer described corruption as a blight consuming the government.
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