voluntary (adjective) voluntary: willing
Sinonime: autonomous,
chosen,
deliberate, designful, discretional, elected,
free, free-willed,
freely,
gratuitous, honorary,
independent,
intended,
intentional, opted, optional,
spontaneous, unasked, unbidden, uncompelled, unconstrained, unforced, unpaid, unprescribed, volitional,
volunteer, willed, willful, wished, witting
Antonime: forced, involuntary,
obligatory,
unwilling