expatiateth

Verb

expatiate (third-person singular simple present expatiates, present participle expatiating, simple past and past participle expatiated)

1. To write or speak at length; to be copious in argument or discussion.
   • [H]e expatiated on the inconveniences of trade, that carried from us the commodities of our country, and made a parcel of upſtarts as rich as men of the moſt ancient families of England.1716 March 15 (Gregorian calendar), Joseph Addison, “The Free-holder: No. 22. Sunday, March 5. [1716.]”, in The Works of the Right Honourable Joseph Addison, Esq; […], volume IV, London: […] Jacob...

   Synonyms:

   descant, dilate, enlarge, expound, expand, elaborate

2. (rare) To range at large, or without restraint.
   • [L]ooks on heav'n with more than mortal eyes, / Bids his free ſoul expatiate in the skies, / Amidſt her kindred ſtars familiar roam, / Survey the region, and confeſs her home! Such was the life great Scipio once admir'd, / Thus Atticus, and Trumball thus retir'd.1713, [Alexander] Pope, Windsor-Forest. […], London: […] Bernard Lintott […], →OCLC, page 62
3. (obsolete) To expand; to spread; to extend; to diffuse; to broaden.