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Expatiate

//ɪkˈspeɪʃɪeɪt// verb

Verb

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."
2
add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing wordnet
3
To range at large, or without restraint. rare
"[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."
4
To expand; to spread; to extend; to diffuse; to broaden. obsolete

From the participle stem of Latin expatior, from ex- + spatior (“walk about”).

Unscramble this word: expatiate