a.
1.
Volitional.
2.
Spontaneous, free, unforced, unconstrained, without compulsion, free-will.
3.
Willing, from inclination.
4.
Designed, intended, intentional, purposed, deliberate.
5.
Optional, discretional.
6.
( Law. ) a. Free, without compulsion. b. Gratuitous, without consideration.