Ummistust
Ummistust is a Finnish term that denotes obstruction or blockage: both the act of obstructing and the state in which something does not operate smoothly or allow fluid, air, or information to pass. It is used in technical contexts such as engineering, plumbing, HVAC, and process design, as well as in everyday language to describe impediments in activities, traffic, or decision-making.
The word stems from the verb ummistaa, meaning to block or obstruct. The noun form conveys the
In engineering and infrastructure, ummistust describes physical blockages such as clogged pipes, drains, or ventilation channels,
Related concepts include ummistus or ummistukset for specific instances of blockage, tukos for general blockage in