expound

verb /ɪkˈspaʊnd/
  1. to explain something by talking about it in detail
    • expound something (to somebody) He expounded his views on the subject to me at great length.
    • the theory of language expounded by Chomsky
    • She expounded her theory further in the course of her talk.
    • These ideas were originally expounded by Plato.
    • expound on something We listened as she expounded on the government's new policies.
Origin: Middle English expoune (in the sense ‘explain (what is difficult)’): from Old French espon-, present tense stem of espondre, from Latin exponere ‘expose, publish, explain’, from ex- ‘out’ + ponere ‘put’. The origin of the final -d (recorded from the Middle English period) is uncertain (compare with compound, propound).

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