abandoned
arbitrary
autonomous
discretional
discretionary
elective
free
free will
go-go
gratuitous
immoderate
incontinent
independent
indulgent
intemperate
irrepressible
lax
licentious
loose
nonmandatory
nonrestrictive
offered
optional
out of control
out of hand
permissive
proffered
rampant
reinless
riotous
self-acting
self-active
self-determined
self-determining
spontaneous
unasked
unbesought
unbidden
unbridled
uncalled-for
unchecked
uncoerced
unconstrained
uncontrolled
uncurbed
unforced
ungoverned
uninfluenced
uninhibited
uninvited