Disquisition (noun)
dis-kwiz-ish-un
A long or elaborate essay or discussion on a particular subject.
Late 15th century via French from Latin disquisitio(n-) ‘investigation’, based on quaerere ‘seek’. The original sense was ‘topic for investigation’, whence ‘discourse in which a subject is investigated’ (mid 17th century).
Example sentences
“He almost bored me to death with a disquisition about website coding.”