- pure, unmixed, undiluted - not mixed; "pure oxygen"
Antonym: relative (indirect, via absolute)
- plain, sheer, unmingled, unmixed - not mixed with extraneous elements; "plain water"; "sheer wine"; "not an unmixed blessing"
Antonym: impure (indirect, via pure)
- uncompounded, unmixed - not constituting a compound
Antonym: combined (indirect, via uncombined)