Here are some synonyms for "discarded":
* Abandoned
* Disposed of
* Dumped
* Rejected
* Thrown out
* Cast off
* Shed
Here are some examples of how "discarded" can be used in a sentence:
* "The old computer was discarded and replaced with a new one."
* "He discarded the empty coffee cup in the trash."
* "The clothes were discarded on the floor."
* "The company discarded its old marketing strategy."
Note: "Disguarded" is not a common word in everyday language. It is more often used in formal writing or when describing something that has been deliberately thrown away.