Synonyms and related words :
abandoned, arbitrary, autonomous, deserted, discretional, discretionary, disregarded, elective, free, free will, gratuitous, half-done, ignored, independent, laid aside, left undone, missed, neglected, nonmandatory, offered, omitted, optional, overlooked, passed by, passed over, passed up, pigeonholed, proffered, put aside, self-acting, self-active, self-determined, self-determining, shunted, sidelined, sidetracked, slighted, spontaneous, unasked, unattended to, unbesought, unbidden, uncalled-for, uncared-for, unchaperoned, uncoerced, uncompelled, unconsidered, undone, unforced, uninfluenced, uninvited, unlooked-for, unpressured, unprompted, unregarded, unrequested, unrequired, unsought, untended, unwatched, voluntary, volunteer, willful