pure 
(pyr)
(pyr)adj. pur·er, pur·est
1.
a. Having a homogeneous or uniform composition; not mixed: pure oxygen.
b. Free of dirt, pollutants, infectious agents, or other unwanted elements: pure water.
c. Containing nothing inappropriate or extraneous: a pure style of piano playing.
2. Complete; utter: pure folly.
3.
a. Having no moral failing or guilt: "I felt pure and sweet as a new baby" (Sylvia Plath).
b. Chaste; virgin.
4. Of unmixed blood or ancestry.
5. Genetics Produced by self-fertilization or continual inbreeding; homozygous: a pure line.
6. Music Free from discordant qualities: pure tones.
7. Linguistics Articulated with a single unchanging speech sound; monophthongal: a pure vowel.
8. Theoretical; not applied: pure science.
9. Philosophy Free of empirical elements: pure reason.
[Middle English pur, from Old French, from Latin pūrus; see peuə- in the Appendix of Indo-European roots.]
purely adv.
pureness n.