expound

/ɪkˈspaʊnd/verb

To explain the meaning of something thoroughly and at length.

Example sentence

“The professor expounded on his theory for over an hour.”

Formal, and often faintly mocking when someone talks too long: 'He expounded on his theory for an hour.' Usually followed by 'on' or 'upon'.

Related words

expressiveShowing thoughts or feelings clearly and vividly.exploreTo travel through a place to learn what it is like or to look for new discoveries.exquisiteExtremely beautiful, delicate, or finely made; exceptional in quality.exploitA brave, daring, or remarkable act.extensiveLarge in amount, range, or area.explicitStated clearly and in full detail, leaving no room for doubt.