Geyser
A vent that periodically releases hot water and steam — pressure built underground until release becomes predictable.
A geyser in a dream is the dream's image of pressure that has built up enough underground to release on a schedule. Geysers are not accidents; they are systems. The dream brings the geyser when an emotional or systemic pressure in your life has reached the stage of periodic eruption — the argument that happens every month, the breakdown that follows every push of work, the apology that keeps arriving. A geyser observed and named is the dream telling you the cycle is now visible and can be planned around. A geyser whose timing has become irregular and violent is the dream noting that the underground pressure has changed and the old pattern is no longer safe to predict.