How to Say "unadulterated" in Spanish
The Spanish word for “unadulterated” is “puro” — A2 level. This is a very common word in everyday Spanish.
English → SpanishA2
AdjectiveA2
quality

Examples
El aire de la montaña es muy puro.
The air in the mountains is very pure.
Ella solo bebe agua pura, sin minerales añadidos.
She only drinks pure water, without added minerals.
Gender Matching
As an adjective, 'puro' must match the thing it describes in both gender (masculine/feminine) and number (singular/plural): 'puro' (m.s.), 'pura' (f.s.), 'puros' (m.pl.), 'puras' (f.pl.).
Forgetting the Feminine Form
Mistake: “Using 'puro' for a feminine noun, e.g., 'agua puro'.”
Correction: Use the feminine form: 'agua pura'. Remember that 'agua' is feminine even though it starts with 'a'.
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