What is the prefix and suffixes of discredited?

Here's the breakdown of the prefix and suffix in "discredited":

* Prefix: "dis-"

* Suffix: "-ed"

Meaning:

* "dis-" means "not" or "the opposite of"

* "-ed" is the past tense ending for verbs (and also a past participle ending)

Therefore, "discredited" means "to have lost credibility or to have been shown to be false".