This is the 9175th most frequent Spanish word.
abalanza
"Abalanza" means "he/she/it rushes, lunges, or charges."
Here, 'abalanza' refers to the action of launching oneself at something swiftly, typically with energy or force.
El gato se abalanza sobre el ratón.
The cat pounces on the mouse.
In this sentence, 'abalanza' depicts a powerful and fast movement made by an object, in this case, the wave.
La ola enorme se abalanza contra las rocas.
The huge wave crashes against the rocks.
For this usage, 'abalanza' describes the collective hurried movement of people towards a target.