inertia

/ɪˈnɜrʃə/
noun
  1. A tendency to stay in the same state or keep doing the same thing, often resulting in a lack of change or progress.
    • After the holidays, it was hard to overcome my inertia and start exercising again.
    • Political inertia often prevents important reforms from happening.
    • The committee's inertia meant no decisions were made for months.
  2. In physics, the property of matter by which it continues in its existing state of rest or uniform motion in a straight line unless acted upon by an external force.
    • Newton's first law of motion is often called the law of inertia.
    • Because of inertia, the car continued sliding on the icy road after the brakes were applied.
    • A spacecraft in deep space will keep moving forever due to inertia.
Antonyms
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