Dreaming of silence or being mute signifies discomfort or pressure in your life or relationships. It suggests that you may want to express something but lack the courage to do so. This dream can be a signal to release your inner feelings. If you feel silent, it's important to try to articulate your thoughts and emotions, as doing so is crucial for your mental peace.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Mute" (page 297) â resolved via the equivalent "Dumbness" entry.
In a dream, dumbness means corruption in one's religious commitment or falsehood. If one sees himself dumb in a dream, it means that he insults the companions of God's Prophet, upon whom be peace, or backbites honorable people, or that he is a reprobate and an insolent person. If one sees himself mute in a dream, it means that he is ignorant. Dumbness in a dream means rescinding a court decision, or to remain silent when one is supposed to speak. Dumbness in a dream also means dethroning or terminating one's employment, If one sees his tongue tied up in a dream, it means that he will gain eloquence, mastery of words, clarity of speech, wisdom in his words and prosperity, and it means that he will win victory over his enemy.
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.