Definitions

1. adjective

least known or hardest to understand

“The professor’s use of obscurest terminology made it difficult for the students to follow the lecture.”

2. adverb

in a way that is least known or hardest to understand

“She spoke in the most obscurest way, making it hard for her listeners to comprehend her message.”

3. noun

the most obscure or unknown thing

“The obscurest book on the shelf was a rare edition that few people had ever heard of.”