mouthpiece
UK[ˈmaʊθpiːs]US[ˈmaʊθpiːs]
n
The part of a musical instrument, telephone, or other device that is placed in or near the mouth.
n
A person, newspaper, etc. that expresses the opinions of a government or a political group.
Morpheme Breakdown
mouth
piece
mouth
body part
piece
part
Etymology
The word 'mouthpiece' is a transparent English compound formed from two native elements. 'Mouth' has Germanic origins, tracing back to Proto-Germanic munþaz, and ultimately to the Proto-Indo-European root ment-, meaning 'to chew' or 'jaw'. 'Piece' entered English via Old French from a presumed Vulgar Latin pettia, possibly of Celtic origin. The compound's logic is straightforwardly literal: a part designed for or associated with the mouth. This literal sense, first applied to items like tobacco pipes or musical instruments, was later extended metaphorically in the 18th century to describe a person who speaks on behalf of others, acting as the figurative 'part' through which an organization's voice is projected.
Analysis
Structure: mouth (body part) + piece (part)
mouth: From Old English mūþ, meaning the opening through which food is taken and sounds are uttered. In this compound, it denotes the location or point of contact.
piece: From Old French piece, meaning a part or portion of something. In this compound, it denotes a distinct component or part.
Examples
He cleaned the mouthpiece of his trumpet before playing.
The official served as the government's mouthpiece during the press conference.
She replaced the cracked mouthpiece on her diving regulator.