mouthpiece

/หˆmaสŠฮธหŒpiหs/

IPA: /M AW1 TH P IY0 S/

noun
  1. 1

    A part of any device that functions in or near the mouth, especially:

  2. 2

    A spokesman; one who speaks on behalf of someone else.

    โ€œThe novel's protagonist serves as a mouthpiece for the author's political views.โ€

  3. 3

    A lawyer for the defense.

Source: https://en.wiktionary.org/wiki/mouthpiece