Direct Opposites:
* Hot - Cold
* Up - Down
* Happy - Sad
* Good - Bad
* Light - Dark
* Strong - Weak
* Fast - Slow
* Big - Small
* Old - Young
* Rich - Poor
Gradable Opposites:
These antonyms express degrees of a quality:
* Hot - Warm - Cool - Cold
* Tall - Short
* Expensive - Cheap
* Difficult - Easy
* Loud - Quiet
* Heavy - Light
* Angry - Calm
* Active - Passive
Complementary Pairs:
These antonyms describe mutually exclusive states:
* Alive - Dead
* Male - Female
* Single - Married
* On - Off
* Present - Absent
Converse Antonyms:
These antonyms describe the same situation from different perspectives:
* Buy - Sell
* Give - Receive
* Teacher - Student
* Above - Below
* Employer - Employee
Relational Antonyms:
These antonyms describe a relationship that is reversed:
* Husband - Wife
* Parent - Child
* Employer - Employee
* Doctor - Patient
Note:
* Some words can have multiple antonyms depending on the context.
* Some words may not have a clear-cut antonym.
I hope these examples help you understand antonyms better!