Voiceless
Part of speech: adjective
Definition: Lacking a voice, without vocal sound. Spoken without vibration of the vocal cords; unvoiced. Examples: [t], [s], [f].
Example sentence: The great thing about social media was how it gave a voice to voiceless people.
Whispered
Part of speech: verb
Definition: To speak softly, or under the breath, so as to be heard only by one near at hand; to utter words without sonant breath; to talk without that vibration in the larynx which gives sonorous, or vocal, sound.