expatiate

/ɪkˈspeɪʃieɪt/
verb
  1. To speak or write at length or in detail about a subject.
    • She tends to expatiate on her travel adventures whenever someone asks about her vacation.
    • In his blog post, he expatiated on the benefits of a plant-based diet.
    • The professor expatiated on the history of the Roman Empire for over an hour.
Antonyms
What does "expatiate" mean? | whatsthatwordmean | whatsthatwordmean