godan verb (-su), transitive verb
Transitive verb meaning to cause liquid or mud to fly up and scatter, often by a sudden movement or impact.
車が水たまりを通って、歩行者に泥をはねかした。
The car went through a puddle and splashed mud on the pedestrians.
犬がプールから上がるときに、水をはねかした。
When the dog got out of the pool, it splashed water everywhere.