pure
adj.adj. not mixed with anything else. You use this to describe something that is clean, natural, or 100% one thing.
adj. consisting entirely of one substance or element; free from any contamination or adulteration. Often used to describe abstract concepts that are absolute or unmitigated.
The ring is made of pure gold.
The mountain air felt pure and refreshing after a week in the polluted city.
The mathematician sought a pure solution that relied solely on logic rather than empirical data or messy real-world approximations.
From Middle English pure, pur, from Old French pur, from Latin pūrus (“clean, free from dirt or filth, unmixed, plain”), from Proto-Indo-European *pewH- (“to cleanse, purify”). Displaced native Middle English lutter (“pure, clear, sincere”) (from Old English hlūtor, hluttor), Middle English skere (“pure, sheer, clear”) (from Old English scǣre and Old Norse skǣr), Middle English schir (“clear, pure”) (from Old English scīr), Middle English smete, smeate (“pure, refined”) (from Old English smǣte; compare Old English mǣre (“pure”)).
Typically precedes the noun it modifies; can be used figuratively to mean 'complete' or 'total'.