Stasis
Etymology
From Greek stasis, "a standing, a standstill," from the root of histasthai, "to stand." Intriguingly, the same Greek word also meant civil strife or faction — a society deadlocked against itself. Medicine borrowed it for the stoppage of a bodily flow, and general usage settled on the sense of arrested change.
noun · /STAY-sis/
A state of no movement, growth, or change — a standstill.
What it names
A condition where forces balance so exactly, or motion stops so completely, that nothing progresses; useful for systems, situations, or bodies frozen in place.
Example
Negotiations reached a stasis, with neither side willing to move and the deadline quietly slipping past.
Related idea
Equilibrium is a stable balance that a system settles into and can hold healthily; stasis emphasizes the absence of change itself, often with a hint that the stillness has become a problem.