[1] : The Collaborative International Dictionary of English v.0.48

unspoken \unspoken\
   see spoken.
   break
see also:
spoken 

[2] : WordNet (r) 2.0

unspoken
     adj 1: expressed without speech; especially because words would be
            inappropriate or inadequate; "a mute appeal"; "a
            silent curse"; "best grief is tongueless"- emily
            dickinson; "the words stopped at her lips unsounded";
            "unspoken grief"; "choking exasperation and wordless
            shame"- thomas wolfe syn: mute, tongueless, wordless
     2: not made explicit; "the unexpressed terms of the agreement";
        "things left unsaid"; "some kind of unspoken agreement";
        "his action is clear but his reason remains unstated"
        syn: unexpressed, unsaid, unstated, unuttered, unverbalized,
         unverbalised, unvoiced
see also:
mute tongueless wordless unexpressed unsaid unstated 
unuttered unverbalized unverbalised unvoiced 

[3] : WordNet (r) 2.0

unspoken
     see unspeak
see also:
unspeak 

[4] : Moby Thesaurus II by Grady Ward, 1.0

62 moby thesaurus words for "unspoken":
   arcane, cabalistic, censored, classified, close, closed, concealed,
   cryptic, dark, enigmatic, esoteric, hermetic, hidden, hinted,
   hush-hush, implicit, implied, inferred, intimated, latent, mute,
   mysterious, occult, restricted, secret, silent, smothered, stifled,
   suggested, suppressed, tacit, top secret, ulterior, unbreatheable,
   undeclared, under security, under wraps, understood, undisclosable,
   undisclosed, undivulgable, undivulged, unexpressed, unmentioned,
   unproclaimed, unpronounced, unpublished, unrecorded, unrevealable,
   unrevealed, unsaid, unstated, unsung, untalked-of, untellable,
   untold, unutterable, unuttered, unvoiced, unwhisperable, unwritten,
   wordless

Unspoken >> U Words
Unspoken, definition of term: Unspoken
unspoken_pag1.html