expatiate
Word family nounexpatiationexpatiatoradjectiveexpatiativeverbexpatiate
ex·pa·ti·ate /ɪkˈspeɪʃieɪt/ verb 1.expatiate on/upon something phrasal verbphr v formalDETAIL to speak or write in detail about a particular subject 详述,阐述 Origin expatiate (1500-1600) Latin exspatiatus, past paticiple of exspatiari “to wander freely”, from spatium “space”