notoriously

Notoriously means that someone or something has a reputation for being very bad or extreme. It's often used to describe behavior or actions that are considered unacceptable.

You might hear people say things like "The city is notoriously congested during rush hour" - this means that it's really, really crowded and hard to get around during those peak hours. They're not just saying it's a little bit busy, they're saying it's infamous for being super crowded.

The word can also be used in other ways, like "The new employee was notoriously late on his first day" - this means that he had a bad habit of showing up way behind schedule, and people were talking about how unreliable he seemed. The word can even be used to describe something or someone that's extremely good at something, like "She's notoriously good at solving puzzles." But usually, it's not used in the positive sense - more often than not, it's describing behavior that's considered annoying or unacceptable.