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: My self-imposed mandate is to be the voice for the voiceless.
Disfranchised
Part of speech: verb
Definition: To deprive someone of some privilege, especially the right to vote; to disenfranchise.