Answer:
It is like a contradiction of two words
Step-by-step explanation:
For example, the phrase "jumbo shrimp" could be read in different ways.
One way is to interpret it as a large shrimp as jumbo means large. Shrimp in this case refers to the food/animal.
Another way is to interpret it as "large" and "small", because "shrimp" can mean "small" as well.
Another example might be "pretty ugly"
One way to interpret "pretty ugly" is "quite ugly", or "rather ugly"
Another way is to interpret "pretty" is "beautiful". Because "beautiful" and "ugly" are opposites, "pretty ugly" is an oxymoron.
Another example is a "silent scream".
a silent scream might mean screaming internally/ in your head, and so it would be silent. However, screams generally are pretty loud, so saying a scream is "silent" is an oxymoron.
Note that oxymorons usually need to make sense, "large small", for example, doesn't make much sense because there is no other meaning to "large small" than interpreting it as "large" and "small".