Unvoiced (adjective)

1. Not pronounced with vibration of the vocal cords, as in whispered speech.
2. Not expressed in words.
3. Not having a voice or speech.

Origin:

Derived from the word 'voice' meaning a sound made by the vibration of the vocal cords.

Examples:

1. The unvoiced sounds in speech are important for the distinction of words.
2. The unvoiced thoughts remained in her mind.
3. The unvoiced emotions could be felt by everyone in the room.
4. The unvoiced criticism was expressed through body language.
5. The unvoiced music was played on the piano with great precision.