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inertia

C2
Fairly common

Pronunciation

UK

  • /ɪnˈɜːʃə/

US

  • /ˌɪˈnɜrʃə/

Meanings

Noun

  1. the physical tendency of matter to resist changes in motion or rest

  2. a tendency to keep doing the same thing and resist change

Beyond the definition

Imagine pushing a parked car. It takes real effort to get it rolling, right? That resistance to getting started is inertia. In physics, it is the tendency of an object to resist any change in its state of motion. In simple terms, something at rest tends to stay at rest, and something in motion tends to keep moving at the same speed and in the same direction unless an outside force acts on it.

Inertia is not just about physics. We often use the word in a wider way too. A company stuck in its old ways might be described as having "organizational inertia," meaning it resists new strategies. You might also feel a kind of inertia after a long vacation: a heavy reluctance to get back into your usual routine. Isaac Newton made this idea central to classical physics, but we still use it in everyday life to describe the pull of habits and systems.

Examples

  1. 1

    Physics

    Because of inertia, the bike kept moving for a few meters after she stopped pedaling.

  2. 2

    Institutional change

    Institutional inertia made it hard for the school to adopt a new schedule.

    • Phraseinstitutional inertia

      a large organization’s habit of resisting change

  3. 3

    Management

    The new manager was hired to overcome the inertia that had slowed the team for years.

  4. 4

    Career decision

    Even after he decided to leave, inertia kept him in the same job for another six months.

More examples
  1. 5

    Habit

    We kept paying for the gym membership more out of inertia than enthusiasm.

    • Phraseout of inertia

      simply because a habit or situation continues

See also

Similar

Shades of meaning

Contrast

Used with (collocations)

  • overcome inertia
  • bureaucratic inertia
  • institutional inertia
  • mental inertia

Word family

Explore

  • resistance to change
  • status quo bias

Forms and spellings

2 forms open this card.

Main spelling

  • inertianoun

Forms

  • inertiaspluralnoun