A variety of means was used. Many were shot, most were gassed.
The root word in "imperfect" is "perfect." "Im-" is a prefix added to "perfect" to indicate the opposite or negation of perfection.
voluntary
Voluntary means you have voluntary control, while the involuntary you do not have voluntary control of them.
a turtle n which is not perfect. This turtle may have broken nails, inperfect shells,neck sores, may be blind, etc.
voluntary
voluntary
do voluntary job.
voluntary informant
Voluntary muscles help you to perform voluntary movements.
I played a voluntary on the organ on Sunday. Your response to my request is entirely voluntary.
It is voluntary because your voluntary muscells in the arm are preforming this action.