This is the 5585th most frequent Spanish word.
preocupantes
Worrying or concerning.
Here, 'preocupantes' is used as an adjective to describe the noun 'noticias' (news). It conveys the idea that the news evokes concern or unease.
Las noticias sobre el clima son muy preocupantes.
The news about the climate is very worrying.
In this sentence, 'preocupantes' functions as an adjective describing the noun 'síntomas' (symptoms). It implies that the symptoms are a cause for slight concern.
Los síntomas de la enfermedad son algo preocupantes.
The symptoms of the illness are somewhat concerning.
'Preocupantes' here serves as an adjective modifying 'datos estadísticos' (statistical data), meaning that the data is distressing or causes worry, especially for the experts.