1 (wiktionary) 2 (vi.wikipedia) 3 (en.wikipedia) 4 (glosbe)

Core Words Familarize yourself with the 'core words'.
Etymology Explore the origin of the 'core words'.
Wordsense Learn about the wordsenses of the english term.

COMPOUNDS

cơi nới build an extension
khất nợ to request a deferral, extension of a loan
ngoại diên denotation, extension