How to Say "unaffected" in Spanish
The Spanish word for “unaffected” is “auténtica” — B2 level. This is a very common word in everyday Spanish.
English → SpanishB2
AdjectiveB2
natural behavior

Examples
Su personalidad es muy auténtica, siempre dice lo que piensa.
Her personality is very sincere/true to herself; she always says what she thinks.
La escritora tiene una voz narrativa auténtica que atrae al lector.
The writer has a genuine narrative voice that attracts the reader.
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