This is the 2777th most frequent Polish word.
grozić
To threaten.
In this sentence, the word 'grozić' is used in a literal sense, meaning 'to threaten' directly.
On grozi, że poda mnie do sądu.
He threatens to take me to court.
Here, 'grozić' is used metaphorically, indicating potential or impending occurrence.
Zachmurzone niebo grozi deszczem.
The overcast sky threatens with rain.
In this example, the nominal form 'grożenie' (derived from 'grozić') is used to generalize the act of threatening.