🇬🇧🇨🇳 unstable - 不稳定 : English Lesson

Meaning of "unstable" ("不稳定"), detailed definition, and a short video lesson below.

Being unstable means lacking stability or firmness, often wobbling, shaking, or being likely to change or fall apart. It can describe physical objects, situations, or even emotions that are not steady or reliable.

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

His unstable chair creaked and groaned every time he sat down.

My mood is unstable—I’m happy, sad, then hungry all at once.

Billy’s hairstyle was unstable—it changed with every gust of wind.

My tower of pancakes was unstable... and then syrup disaster struck.

Grandma’s tower of teacups was unstable—and thrilling to watch!

A girl stacks cups into an unstable pile on an unstable chair by the window. The unstable chair wobbles, cups tilt, and a small cup slides toward the edge. Heart racing, she steadies the chair with one hand, eyes on the unstable cup, and catches it. The unstable tower falls but she laughs, relieved.

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.