* Formal: The professor presented an esoteric theory about the origins of the universe, which was difficult for most students to grasp.
* Casual: My friend is really into esoteric rituals and believes in ancient magic.
* Descriptive: The book delved into the esoteric world of medieval alchemy, exploring its symbolism and practices.
* Comparative: While mainstream music is popular, I prefer listening to esoteric genres like experimental jazz.
* Negative: The politician's speech was filled with esoteric language that alienated many voters.
Remember that "esoteric" implies something obscure, understood by only a select few, and often associated with knowledge or practices considered mysterious or mystical.