mute, tongueless, unspoken, wordless -- (expressed without speech; "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)
unexpressed, unsaid, unstated, unuttered, unverbalized, unverbalised, unvoiced, unspoken -- (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")
(TTS Sound)
