The word "afterdiscovered" is spelled with a mix of prefixes and the root word "discovered." Its phonetic transcription in IPA is /ˌæftərdɪˈskʌvərd/. The prefix "after" means "later than," while "discovered" is the past participle of "discover." So "afterdiscovered" means "discovered later on." The word is often used in legal contexts to refer to evidence that's found after a case has been investigated or a verdict has been rendered.