arbitrary autonomous discretional discretionary elective free free will gratuitous independent inessential needless nonessential nonmandatory offered optional proffered self-acting self-active self-determined self-determining spontaneous unasked unbesought unbidden uncalled-for uncoerced uncompelled unessential unforced uninfluenced uninvited unnecessary unneeded unpressured unprompted unrequested unsolicited unsought voluntary volunteer willful