Pedantic   pe·​dan·​tic | \ pi-ˈdan-tik

1. Like a pedant, overly concerned with formal rules and trivial points of learning.
2. Being showy of one’s knowledge, often in a boring manner.
3. Being finicky or fastidious, especially with language.

Esoteric  es·​o·​ter·​ic | \ ˌe-sə-ˈter-ik

1. Intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle.
   The writing in this manual is very esoteric; I’d need a degree in engineering just to understand it!
2. Having to do with concepts that are highly theoretical and without obvious practical application; often with mystical or religious connotations. 
3. Confidential; private.
   an esoteric purpose
   an esoteric meeting

Recherché  (re·​cher·​ché | \ rə-ˌsher-ˈshā )

1. Exquisite; lavishly elegant and refined.
2. Exotic or obscure.

Didactic  di·​dac·​tic | \ dī-ˈdak-tik

1. Instructive or intended to teach or demonstrate, especially with regard to morality. Synonyms: educative, instructive
   didactic poetry
2. Excessively moralizing.

References

• Enounce 
• Recherché Sports 
• Pedantic (Comprise) 
• Didactic vs Pedantic 

Doggerel
My attempt at a couplet using some of this week's vocabulary:
You can use "esoteric", it gets the job done, but to be really slick and have more fun  put on your beret, use instead,  "recherché"!