That property of matter by which it tends when at rest to remain so, and when in motion to continue in motion, and in the same straight line or direction, unless acted on by some external force; -- sometimes called vis inertiae.
Inertness; indisposition to motion, exertion, or action; want of energy; sluggishness.
Want of activity; sluggishness; -- said especially of the uterus, when, in labor, its contractions have nearly or wholly ceased.
All that is necessary to break the spell of inertia and frustration is this: Act as if it were impossible to fail. That is the talisman, the formula, the command of right about face which turns us from failure to success. Dorthea Brande
Total physical and mental inertia are highly agreeable, much more so than we allow ourselves to imagine. A beach not only permits such inertia but enforces it, thus neatly eliminating all problems of guilt. It is now the only place in our overly active world that does. John Kenneth Galbraith