phlegm, impassibility, stationariness, unconcern, unalterability, fastness, secureness, composure, indifference, quietude, rigidity, tranquillity, stoicism, fixity, stolidity, unfeelingness, inflexibility, fixture
inaction (part of speech: noun)
motionlessness (part of speech: noun)
stability (part of speech: noun)
inertness (part of speech: noun)
insensibility, stillness, motionlessness, lethargy, reposefulness, idleness, apathy, lifelessness, inactivity, catatonia, listlessness, dormancy, inanimation, coma, passivity, sluggishness, stagnancy, hibernation, paralysis, languor, inertness
- And so looking, he saw the smile freeze upon her face to a mask- like immobility. - "The Safety Curtain, and Other Stories", Ethel M. Dell.
- Each time that I take a fresh victim from the terrible slaughter- house, my surprise is renewed at the sight of its sudden immobility. - "The Life of the Spider", J. Henri Fabre.
- Lastly, only the immobility which he mentions will come under circular motion. - "On Prayer and The Contemplative Life", St. Thomas Aquinas.