Forespoken is a rarely used word meaning "previously mentioned" or "previously spoken." Its antonyms are words that indicate a lack of prior reference or speech. These include unheard, unsaid, untold, and unspecified. Unheard means that something has not been listened to or is unknown. Unsaid refers to words that have not been spoken aloud but may have been implied. Untold alludes to things never spoken of, while unspecified refers to something that has not been specifically mentioned. These antonyms can be useful when trying to communicate a lack of prior knowledge or reference.