Ayornar from the Italian aggiornare, and this in turn from giorno, dia; update, put to fashion, ooneral day. Some synonyms, words or similar expressions may be allornar, agiornar, aggiornar
In lunfardo means to update, catch up. Catch up, find out.
Lunfa version of the Italian aggiornare ( "catch up") is used more as a pronominal ( p . E.g. yornarse).