This is the 873rd most frequent Spanish word.
creciente
"Creciente" means "growing" or "increasing" in English.
In this sentence, 'creciente' is an adjective meaning 'growing' or 'increasing,' describing the noun 'preocupación' (concern).
La preocupación por el cambio climático es creciente.
Concern about climate change is growing.
Here, 'creciente' is used as an adjective to describe the moon phase, which is increasing in illuminated area after the new moon.
La luna creciente se veía hermosa en el cielo.
The crescent moon looked beautiful in the sky.
In this example, 'creciente' is used to modify 'interés' (interest), conveying the idea of something progressively increasing over time.