The underground was so warm that my glasses fogged up and I accidentally smiled at a trash can, thinking it was a person.
On the underground, the driver’s announcement was so muffled I decided it was probably ancient tunnel magic talking.
I tried to stand without holding on in the underground, and instantly invented a new dance called “The Wobbly Flamingo.”
We got lost on the underground and ended up in a station that smelled like fries and mysterious adventure.
The underground zoomed under the city so fast that I realized: while people above were stuck in traffic, we were basically ninja moles riding a rocket train.
Rain dulled the city. On the underground platform a small dog shivered. The underground train hissed; doors opened like arms. A tired man lifted the dog into his coat and boarded the underground, holding it. The underground lights hummed; the dog slept. They rode the underground to the last stop. The man smiled as they stepped into warm street air.
🧑🎓 CEFR Level: C2 Proficient
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.
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