This is the 1952nd most frequent Spanish word.
siniestro
Sinister, ominous, or an accident/disaster.
In this sentence, 'siniestro' is used as an adjective to describe something frightening, tragic, or very serious.
El accidente en la carretera fue realmente siniestro.
The accident on the road was truly sinister.
Here, 'siniestro' refers to an incident or calamity, typically insured against, like in legal or financial contexts.
La aseguradora cubrió los gastos del siniestro.
The insurance company covered the expenses of the calamity.
In this context, 'siniestro' is used to describe someone's demeanor as spooky or malevolent, reflecting a negative or eerie connotation.