purest

adjective

1. 1

   Free of flaws or imperfections; unsullied.

2. 2

   Free of foreign material or pollutants.

3. 3

   Free of immoral behavior or qualities; clean.

4. 4

   Mere; that and that only.

   “That idea is pure madness!”

5. 5

   (of a branch of science) Done for its own sake instead of serving another branch of science.

6. 6

   Of a single, simple sound or tone; said of some vowels and the unaspirated consonants.

7. 7

   (of sound) Without harmonics or overtones; not harsh or discordant.