mouth

B1 · Intermediate Countable noun

n. the place where a river enters the sea, or the entrance to a cave or tunnel.

n. the point where a river issues into a larger body of water, or the entrance to a hollow structure such as a cave or valley.

“The city was built near the mouth of the river to help with trade.”

“As they approached the mouth of the cavern, the temperature dropped significantly and the sound of dripping water echoed from within.”

C1 · Advanced Countable noun Informal · Slang

n. a person who talks too much or says rude things.

n. a person who is excessively talkative, boastful, or prone to making tactless remarks.

“Don't listen to him; he's just a big mouth who likes to complain.”

“The office mouth couldn't help but reveal the details of the confidential merger before the official announcement was made.”

B2 · Upper Intermediate

v. to move your lips as if you are speaking, but without making any sound.

v. to form words with the lips silently, often to communicate privately or to accompany a recording.

“She mouthed the words 'thank you' from across the crowded room.”

“During the performance, the backup singers were clearly mouthing the lyrics rather than actually singing into their microphones.”

C1 · Advanced Formal

v. to say something without really meaning it or thinking about it.

v. to utter words or ideas in a mechanical or insincere manner, often without genuine conviction.

“The politician just mouthed the same old promises during his speech.”

“It was disappointing to hear the CEO simply mouth corporate platitudes instead of addressing the employees' specific concerns about job security.”