Meaning & use
inertia
The tendency of an object to remain still or keep moving unless a force acts on it.
See it in a sentence
The physics teacher explained inertia using a coin balanced on a spinning card.
Sheer inertia kept him in the same job long after he had stopped enjoying it.
A note on using this word
Inertia is a precise physics term but is also used figuratively for a reluctance to change habits or take action.
Words with a similar meaning
inactivity
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
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