How to Say "cleanness" in Spanish
The Spanish word for “cleanness” is “pureza” — B1 level. This is a very common word in everyday Spanish.

Examples
La pureza del agua de esta montaña es famosa.
The purity of the water from this mountain is famous.
El anillo está hecho de oro de gran pureza.
The ring is made of high-purity gold.
Los científicos analizan la pureza del aire en la ciudad.
Scientists analyze the air purity in the city.
The '-eza' suffix
In Spanish, many nouns that describe a quality end in '-eza' (like 'pobreza' for poverty). These words are almost always feminine, so you should use 'la' or 'una'.
Abstract versus Physical
Even though 'pureza' describes a quality, it functions just like 'water' or 'gold' in a sentence; you can measure it or describe how much of it there is.
Gender confusion
Mistake: “el pureza”
Correction: la pureza (because words ending in -eza are feminine).
Spelling with 's'
Mistake: “puresa”
Correction: pureza (Spanish words ending in the -eza sound for qualities are spelled with a 'z').
Related Translations
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