This is the 5847th most frequent Spanish word.
sufrieron
"Sufrieron" means "they suffered."
Here, 'sufrieron' is used in the past tense to describe the action of experiencing pain or hardship.
Ellos sufrieron mucho durante la guerra.
They suffered a lot during the war.
'Sufrieron' indicates that the books experienced damage, illustrating another usage of the verb to express undergoing adverse effects.
Los libros en el estante sufrieron daños por el agua.
The books on the shelf suffered water damage.
This sentence uses 'sufrieron' in a negative statement to indicate that no harm or misfortune was encountered.