To dream of being dumb, indicates your inability to persuade others into your mode of thinking, and using them for your profit by your glibness of tongue. To the dumb, it denotes false friends.
Islam
Dream symbolism suggests that being rendered speechless or dumb in a dream can signify a compromise in one’s religious devotion or the propagation of falsehood. If someone dreams of being mute, it may suggest disrespectful behavior towards the companions of Allah’s Prophet, Sallallaahu-Alayhi-wasallam, or engaging in backbiting against honorable individuals. This dream could also indicate a state of moral degradation and insolence.
Moreover, dreaming of muteness may symbolize ignorance. It implies a lack of knowledge or awareness in the dreamer’s life. The inability to speak in the dream reflects a potential deficiency in understanding or a failure to communicate effectively.
In essence, such dreams serve as cautionary symbols, urging the dreamer to be mindful of their words, actions, and commitment to religious principles.