toneless russian

• глухо́й

  deaf, deaf (to)

  muffled, dull, toneless, indistinct

  remote, out-of-the-way, godforsaken

  dense, thick, impenetrable

  blank (wall), windowless, solid

  voiceless, unvoiced

• невырази́тельный

  inexpressive, toneless, expressionless

Examples

• Актёр читал текст невыразительным тоном.

  The actor read the text in a toneless voice.