Accident doesn't imply it wasn't avoidable.

But unless she intentionally hit the child it was an accident on her part. I'm referring to a specific incident, not crashes in general. I thought that would be abundantly clear from the context. I certainly doubt she foresaw or planned on hitting a child.

https://www.merriam-webster.com/dictionary/accident

> 1 a : an unforeseen and unplanned event or circumstance