From The Collaborative International Dictionary of English v.0.48 [gcide]:
Unvoiced \Unvoiced\
See voiced.
From WordNet (r) 3.0 (2006) [wn]:
unvoiced
adj 1: produced without vibration of the vocal cords; "unvoiced
consonants such as `p' and `k' and `s'" [syn: unvoiced,
voiceless, surd, hard] [ant: soft, sonant,
voiced]
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, unspoken]