ex ‧ pound /ɪkˈspaʊnd/ BrE AmE verb [intransitive and transitive]
[ Date: 1200-1300 ; Language: Old French ; Origin: espondre , from Latin exponere ; ⇨ ↑ expose ]
formal to explain or talk about something in detail
expound on
She’s always expounding on the latest dogmas of feminism.