The antonym for "none" is "some". I guess. You can't really say none has an antonym.
Some.
All
no one
somebody
some
One opposite is "forgettable."
One opposite of "grasp" can be "relax". One opposite of "unwind" can be "ravel".
The opposite of dark is "light."
The opposite of all is none. (or no one, if persons)
the plural of opposite is opposites.
The opposite of no one is everyone.
the answer is steady
One opposite is "untried".
One opposite is "forgettable."
Exposure is one opposite.
The opposite of one half is negative one half.
One opposite of "grasp" can be "relax". One opposite of "unwind" can be "ravel".
The opposite of corrupt is honest or incorruptible. It refers to individuals or systems that are free from deception, dishonesty, or unethical behavior.
One opposite to native is alien.
An additive opposite, yes. A multiplicative one, no.
The opposite of micro is "macro." (large size) The opposite prefix of micro- (one millionth) is mega- (one million).
The opposite of dark is "light."