This is the 9262nd most frequent Spanish word.
acontecida
"Acontecida" means "occurred" or "happened" in English.
The word "acontecida" is used as a past participle, modifying "tragedia" to indicate that the happening or event occurred in the past.
La tragedia acontecida ayer en el pueblo dejó a todos en shock.
The tragedy that occurred yesterday in the village left everyone in shock.
Here, "acontecidos" serves as a past participle modifying "hechos," referring to events that have occurred.
Fue testigo de los hechos acontecidos en el lugar.
He/she was a witness to the events that took place at the location.
In this case, "acontecidas" is used to describe "historias," matching with the feminine plural form.