* Hot vs. Cold: The soup was too hot, so I had to wait for it to cool down before I could eat it.
* Happy vs. Sad: She felt happy after receiving the good news, but her friend was sad because she didn't get the job.
* Light vs. Dark: The room was dimly lit, making it feel dark and mysterious, unlike the bright hallway outside.
* Open vs. Closed: The store was open for business, but the library was closed for the day.
* Fast vs. Slow: The cheetah ran fast across the savanna, while the tortoise moved slowly towards the finish line.
* Strong vs. Weak: The strong wind knocked over the tree, but the little seedling remained weak and unmoved.
* Quiet vs. Loud: The library was a quiet place for reading, but the concert was loud and energetic.
* Big vs. Small: The big elephant towered over the small mouse.
* Clean vs. Dirty: The kitchen was spotless and clean, but the bathroom was dirty and needed a good scrub.
* Up vs. Down: The plane took off and flew up into the sky, while the balloon slowly drifted down to the ground.
These examples illustrate how antonyms create a sense of contrast and emphasize opposing ideas within a sentence.