IPA: /nəˈtɔːrɪəsli/
KK: /nəˈtɔrɪəsli/
In a way that is well known for something bad or undesirable.
He is notoriously late to meetings, which frustrates his colleagues.
Notoriously → It is formed from "notorious" (from Latin *notorius*, meaning well-known or famous) and the suffix "-ly" (meaning in a manner of). The word "notoriously" means in a manner that is well-known, often for something negative or infamous.
Think of someone being 'well-known' ('notorious') for something, and the '-ly' just means in that manner. This helps you remember that 'notoriously' describes how someone is known, often for bad reasons.