🇬🇧🇨🇳 inertia - 惯性 : English Lesson

Meaning of "inertia" ("惯性"), detailed definition, and a short video lesson below.

Inertia is the rule of nature that says: if something is resting, it will stay resting, and if something is moving, it will keep moving in the same way, unless a push, pull, or another force makes it speed up, slow down, or change direction.

Watch and listen to this English flashcard to understand the word in more detail, with an easy example sentence.

Grandpa said his inertia wouldn’t let him get off the recliner, so we had to bring the snacks to him as a “helping force.”

At bedtime, my body’s inertia glues me to the couch, but in the morning, my inertia glues me to the bed instead.

My brain’s inertia keeps it in weekend mode on Monday, so it rolls right past the math problems without stopping.

The hamster’s inertia kept his ball zooming forward, while he inside looked like a tiny astronaut regretting his life choices.

Inertia is part of Newton’s First Law of Motion, which basically means the universe agrees with your bed that once you’re lying down, you should just stay there unless something pushes you to move.

On the park bench a skateboard lay still; inertia kept it quiet until a child nudged it. Inertia made it slide, then inertia kept it gliding past a sleeping dog. The dog blinked at inertia, jumped, and finally stopped the board. The child laughed; the dog sighed, letting inertia end the game.

This word is at the C2 level, which means it represents the highest mastery of English. It’s often used in specialized or highly formal contexts and helps you communicate with precision and subtlety, much like a native speaker.

Expanding your English vocabulary is one of the best ways to improve your pronunciation, spelling, and confidence in English. Watch the video above to memorize the word, understand its meaning, and see example sentences in action. Discover related words to grow your vocabulary naturally. Add words to your playlist for stress-free, effective learning—anytime, anywhere! Watch, learn, repeat.