brutally
In a very cruel, harsh, or extremely rough way.
Brutally means in an extremely harsh, cruel, or violent way. When something happens brutally, it happens with shocking force or severity, without any gentleness or mercy. A knight in a medieval story might defeat his enemy brutally, using overwhelming force.
The word often describes physical violence, but it also describes harsh honesty or difficult conditions. When someone is brutally honest, they tell the truth in a blunt way that might hurt someone's feelings. A teacher giving brutally honest feedback is telling a student exactly what needs improvement without sugarcoating it.
You might also hear about brutal cold (extremely severe weather), a brutal schedule (exhaustingly difficult), or a brutal loss in sports (a devastating defeat, like losing 45 to 3).
When something is described as happening brutally, it emphasizes that there was no kindness, no holding back, and no attempt to make things easier or gentler.