Still river
A river moving slowly enough to appear still — movement so calm it can be mistaken for stillness.
A still river in a dream is the dream's image of movement so calm it can be mistaken for stillness. The river is moving; the eye cannot tell. The dream brings the still river when something in your life — an ongoing relationship, a quiet career, a long routine — is moving in fact and is not registering as movement. A still river floated on with awareness of the current is the dream telling you the calm carrying is real and useful. A still river mistaken for a lake, stepped into as if it would hold place, is the dream noting that you have stopped noticing the drift, and the surface calm is hiding actual displacement.