"Fargone" is an informal word, usually used to describe something that has been lost or forgotten for a long time. However, the word has no antonyms as it is an adjective that does not signify any opposition.
The closest antonyms could be "recent," "current," or "present" - all words that imply the opposite of "fargone." These words would describe something that is fresh, timely, or current.
Alternatively, some antonym suggestions could be "found," "remembered," and "discovered." All of these words imply a state of remembrance or rediscovery, which could be considered the opposite of something "fargone." However, these words are not true antonyms to "fargone" but rather related concepts.