This is the 14242nd most frequent German word.
heraneilenden
"Hurrying towards."
The word 'heraneilenden' is used here as a participle adjective describing the helpers, indicating that they were hurrying towards the accident site.
Die heraneilenden Helfer erreichten den Unfallort in kürzester Zeit.
The rushing helpers reached the accident site in no time.
'Heraneilenden' here also describes the people and conveys the action of quickly approaching the scene of the incident.
Ich bemerkte, dass die heraneilenden Menschen alle in Richtung des brennenden Gebäudes liefen.
I noticed that the rushing people were all running toward the burning building.
In this sentence, 'heraneilenden' characterizes the firefighters, showing their dedication as they hurry towards the scene.