Not polluting; environmentally friendly
Free of foreign material or pollutants.
Of a single, simple sound or tone; said of some vowels and the unaspirated consonants.
Free of flaws or imperfections; unsullied.
Done for its own sake instead of serving another branch of science.
Mere; that and that only.
Without harmonics or overtones; not harsh or discordant.
A lot of.
Free of immoral behavior or qualities; clean.
One who, or that which, is pure.
to a great extent or degree; extremely; exceedingly.
to hit (the ball) completely cleanly and accurately