If you have seen a knife in your mouth in your dream: Some people around you may be unwilling to fulfill their responsibilities or duties, or they may be doing it poorly, even if you offer people to save the world, they may not want to follow you or go the way you want, just because you said it. To see a knife in your mouth in your dream is interpreted that your speech is sharp and your words are heavy on the people in front of you, they break your heart and you will realize this.