The Collaborative International Dictionary of English v.0.48:

Unasked \Unasked\
   See asked.

WordNet (r) 3.0 (2006):

unasked
    adj 1: not asked for; "unasked advice"; "unsolicited junk mail"
           [syn: unasked, unsolicited]

Moby Thesaurus II by Grady Ward, 1.0:

90 Moby Thesaurus words for "unasked":
   abandoned, arbitrary, arrogant, autonomous, deserted, discretional,
   discretionary, disregarded, elective, free, free will, gratuitous,
   half-done, ignored, impregnable, impudent, independent,
   indomitable, inexpugnable, invulnerable, laid aside, left undone,
   missed, neglected, nonmandatory, offered, omitted, optional,
   overbearing, overlooked, passed by, passed over, passed up,
   pigeonholed, presumptuous, proffered, put aside, self-acting,
   self-active, self-determined, self-determining, shunted, sidelined,
   sidetracked, slighted, spontaneous, stalwart, stout, strong,
   sturdy, tenacious, tough, unacceptable, unagreeable, unasked-for,
   unassailable, unattended to, unbeatable, unbesought, unbidden,
   uncalled-for, uncared-for, unchaperoned, uncoerced, uncompelled,
   unconquerable, unconsidered, undefeatable, undesirable, undesired,
   undone, unforced, uninfluenced, uninvited, unpressured, unprompted,
   unregarded, unrequested, unrequired, unsolicited, unsought,
   untended, unwanted, unwatched, unwelcome, unwished, voluntary,
   volunteer, wanton, willful