IPA: /ˌkɒnəˈsɜːr/
KK: /ˌkɒnəˈsɜːr/
A person who has a deep understanding and appreciation of a particular subject, especially in the arts or food, and can judge its quality.
As a connoisseur of cheese, she could easily identify the subtle flavors in each variety.
Connoisseur → It is formed from "connoître" (meaning to know) and the suffix "-eur" (indicating a person who). A connoisseur is a person who knows a lot about a particular subject, especially in the arts or fine foods.
Think of someone who 'knows' ('connoître') a lot about a specific area, like art or wine — that's why a connoisseur is someone with deep knowledge.
No commonly confused words.