mouth

noun

the opening of a jar or bottle
“the jar had a wide mouth”
the externally visible part of the oral cavity on the face and the system of organs surrounding the opening
“I wiped lipstick from my mouth.”
the opening through which food is taken in and vocalizations emerge
“They stuffed their mouth with candy.”
oral cavityoral fissurerima oris
an impudent or insolent rejoinder

lip
the point where a stream issues into a larger body of water
“New York is at the mouth of the Hudson”
an opening that resembles a mouth, as of a cave or a gorge
“We rode into the mouth of the canyon.”
a person conceived as a consumer of food
“They have four mouths to feed.”
a spokesperson (as a lawyer)

mouthpiece

verb