he wanted to speak, but no words came out, only a sigh of despair.
He stood there with his mouth gaped open, utterly shocked by what he had just heard.
I played the mouth organ at the concert last night.
The object of the preposition "in" in the sentence is "mouth." The prepositional phrase "in your big mouth" describes where Henry is putting his foot metaphorically.
The ocean met the river mouth on the beach and the salt water and the fresh water mixed with the incoming tides.
During the concert, the band played a smash-mouth cover of the popular hit song.
Sydni opened her mouth to protest, but her mom silenced her with a look.
He stood there with his mouth gaped open, utterly shocked by what he had just heard.
Cotton mouth
it started when you opened your mouth
she opened her mouth and sang
chewing like a cow
izod
opened mouth
ορθάνοιχτος - adjective, means opened mouth
The mouth of the river is subject to high tides.
Don't eat with your mouth full.
tympanic memberane