This is the 1811th most frequent Swedish word.
förstörda
"Förstörda" means "destroyed" or "ruined" in English.
Here, 'förstörda' is used as an adjective describing the condition of a plural noun, 'böckerna' (the books).
Böckerna var förstörda efter vattenläckan.
The books were damaged after the water leak.
In this case, 'förstörda' is applied as a past participle to describe the resultant state of the furniture after the transport.
Möblerna blev förstörda under transporten.
The furniture got damaged during the transportation.
The word 'förstörda' is used attributively in this sentence to describe the appearance of 'kläder' (his clothes) after an event.