expatiate

It’s all there in the Reuters reporting, and there is no need to expatiate on the obvious immorality of the operation, quite apart from its colossal stupidity.

Do not be afraid to expatiate on all the ways you are a bigger person — there are probably lots!

Dr. Trefusis expatiated at somewhat galling length upon my achievements; which accolades Lord Dunmore received with kind pleasure, saying, “Faith, excellent! Excellent! You are brave boys, all of you.”

When the baron expatiated upon the superior practices of Europe, the Indians were baffled.

We took long walks in the botanical garden in the Bronx, where he could expatiate on every species of fern.