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What is inertia in simple terms?

Hey guys,
Hope you all are well.Board exams are round the corner.No need to panic just keep calm.Well this post is specifically for class 9th students.In rest and motion chapter you all have witnessed the term inertia.So how will you define it to a layman who does not understand physics that well.If I were in your place I would have told them inertia is nothing but resistance to change of state.This state can be rest or motion.In other words tendency to maintain its original state unless and until the external force completely convinces it or gets hold of it to maintain the new state.We all feel reluctant to sudden change.Take an example of getting up early in morning in a cold winter season.Your body and mind tends to maintain the state of sleep even after the alarm starts ringing unless and until you are compelled to get up.Like humans objects also show resistance to change.It is also said that it is difficult to start a motion than to maintain it.That is why Newton's first law is called law of inertia bcz it describes the inability of any object to respond to change unless and until the external force completely gets hold of it.I hope you can now relate the term inertia with these practical examples.
Thank You...

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