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Inertia: meaning, pronunciation and examples

Inertia noun. The tendency of an object to stay still, or keep moving, until a force acts on it.

How to say it

ih-NUR-shuh/ɪˈnəːʃə/

3 syllables, stressed on the second (NUR).

Meanings

  1. The tendency of an object to stay still, or keep moving, until a force acts on it.
  2. A reluctance to change anything or make any effort.

Inertia in a sentence

Inertia is why your coffee sloshes forward when the bus brakes.

The plan wasn’t killed by opposition, just by sheer institutional inertia.

Similar and opposite

Similar:

  • inactivity
  • apathy
  • sluggishness
  • lethargy

Opposite:

  • energy
  • dynamism

Where inertia comes from

From Latin iners, idle or unskilled.

Test yourself

Which word fills the gap?

The plan wasn’t killed by opposition, just by sheer institutional _____.

  • inertia
  • anomaly
  • psephology
Show the answer

inertia: The plan wasn’t killed by opposition, just by sheer institutional inertia.